I would have never considered Yummy as a potential engine to help me set-up a Prediction Princess combo, but then The Star Ham was revealed so here we are. Star Ham is basically just Martial Metal Marcher with more applicability. The Star Ham is a Level 3 Synchro Monster (not a Tuner) that can, on Synchro Summon, discard a card to Special Summon 1 monster from your GY that was used as material for its Synchro Summon, and if you do, (that monster you brought back) is treated as a Tuner. Also, if it is in your GY, it can discard 2 cards to Special Summon itself back, but it is banished if it leaves the field. Most importantly, it is not a Tuner, so unlike Martial Metal Marcher, you can Synchro Summon using it and the monster it brings back as the monster brought back is treated as a Tuner. So, not only does that mean that you can access Ib the World Chalice Justiciar using Star Ham in a Prediction Princess Deck, but it also means that Yummy can access Level 5 Synchros much more easily. Its effect to revive itself is reminiscent of Master of Ham’s own effect to bring itself back, but you are most likely never using that effect. It could come up in other Decks (including other Prediction Princess Decks), but because this Deck, specifically, has a pretty tight Extra Deck, we wouldn’t be able to make anything with it that is worthwhile playing. Personally, I found Yummy to be a very good engine to facilitate Star Ham, but a Level 3 handtrap and Hugin the Runick Wings is just as good. Personally, I just really wanted to try it with Yummy first which gave me this Deck.
Full combo is 2 Yummy names and 2 discards OR 1 handtrap monster, a Yummy name, and 2 discards, OR a Yummy name or handtrap monster, a revive Spell, and 2 discards OR Piri Reis Map and 2 discards. This Deck does not have an issue with opening combo. It does have the downside of not being able to play Obedience Schooled since that does lock you into Beast monsters for the rest of the turn, but the only weakness of the Deck is how interruptible it is. This is not pure Yummy. It is Yummy Prediction Princess which makes the Deck much more susceptible to handtraps and such. Some combos will have different endboard based on what other cards you drew in your hand. But for the most part, you will be getting to full Prediction Princess combo as well as Yummy plays on your opponent’s turn if you are not interrupted. Let’s say that you have Droll & Lock Bird and Cooky☆Yummy in your hand. Normal Summon Droll and Link it off into Salamangreat Almiraj. Special Summon Cooky from hand and then Synchro with both of them into Cupsie★Yummy Way. On Synchro Summon, Cupsie Way searches for Cupsie☆Yummy and Lollipo☆Yummy from Deck before discarding a card. Special Summon both from your hand and then activate Cupsie’s effect on Special Summon to search for Yummy☆Surprise from Deck. Synchro both Cupsies into The Star Ham. On Synchro Summon, Star Ham discards a card to Special Summon Cupsie☆Yummy Way from GY. Synchro Summon Ib the World Chalice Justiciar using Cupsie and Star Ham. On Synchro Summon, Ib adds World Legacy Monstrosity from Deck to hand. Link Lollipo into Yummy★Snatchy. On Special Summon, Snatchy activates Yummysment☆Minion from Deck. Activate Minion targeting any Level 1 Yummy in GY to Special Summon it back from GY. Synchro Snatchy and the Yummy you just brought back into Lollipo★Yummy Way which brings back 2 Yummy monsters from GY, preferably either duplicates or any name that isn’t Snatchy. Banish Lollipo and the 2 Yummy names it brought back to Special Summon Trishula, the Dragon of Icy Imprisonment from your Extra Deck. Activate Monstrosity targeting Trishula to Special Summon Prediction Princess Bibliomuse and Deus-X Krawler from Deck. Overlay Deus-X and Trishula into Mereologic Aggregator who sends Herald of the Arc Light from Extra Deck to GY which triggers to add Prediction Princess Tarotrei from Deck to hand. Activate Aggregator’s other effect to target Herald in GY, detach 1, and reattach Herald from GY to it. Link Aggregator and Herald into I:P Masquerena. Herald triggers in GY again to add Underworld Ritual of Prediction from Deck to hand. Activate Underworld Ritual tributing Bibliomuse to Ritual Summon Tarotrei, Bibliomuse triggers in GY to Special Summon herself back face-down, and then Tarotrei activates to flip her face-up. Bibliomuse’s Flip Effect triggers to add Prediction Princess Tarotreith and another Underworld Ritual from Deck to hand. Activate the second Underworld Ritual to Ritual Summon Tarotreith face-down using Bibliomuse. Then, you can activate Surprise to bring back Cupsie★Yummy Way from GY. End Phase: Tarotrei Special Summons Deus-X back from GY face-down. During your opponent’s Standby Phase, activate Underworld in GY, banishing it to Special Summon BIbliomuse from Deck face-down and then activate Tarotrei’s effect to flip Tarotreith face-up. While Tarotreith’s Flip Effect cannot be used to get Pot of the Forbidden from Deck because our field is completely full, we can still use her Quick Effect to flip Bibliomuse and Deus-X face-up. That allows us to end with Tarotrei, Tarotreith, I:P into S:P, Deus-X which negates all activated monster effects on your opponent’s field, Bibliomuse who searches a Prediction Princess and a Ritual Spell and gives your Ritual Monsters targeting and destruction protection, and Cupsie Way who can return itself back to Extra Deck when your opponent activates a card or effect to Special Summon back up to 2 Yummy monsters from GY which can give you access to the Main Deck Level 1’s to potentially use their effects or bring back a Level 1 and Snatchy to Quick Synchro into Cooky★Yummy Way to book up to 2 monsters the opponent controls on Synchro Summon or to go back into Cupsie Way who can search follow-up Yummy monsters.
For the Main Deck Monsters: 3 Prediction Princess Tarotrei, 1 Prediction Princess Tarotreith, and 3 Prediction Princess Bibliomuse. Tarotrei can Quick Effect flip a monster on field face-up or face-down and she can Special Summon a Flip Monster from hand or GY face-down during your End Phase. Tarotreith must either be Ritual Summoned or Special Summoned via Tarotrei's effect in the End Phase. Her Flip Effect Special Summons a Flip Monster from your Deck face-down and she can also Quick Effect flip any number of your monsters face-up or face-down. Bibliomuse can Special Summon herself back face-down after being Tributed and sent there. Her Flip Effect adds a Prediction Princess monster other than herself and a Ritual Spell from Deck to hand and while she is face-up on the field, your Ritual Monsters gain targeting and destruction protection from your opponent’s card effects. 1 Deus-X Krawler which negates all activated monster effects on your opponent's side of the field after it has been flipped face-up and if it is destroyed on field, you can search for a Level 9 monster with a different Type and Attribute. 1 Pot of the Forbidden which has a Flip Effect that lets you choose between Drawing 2 cards, returning all Spell/Traps on the field to the hand, destroying all monsters your opponent controls, or looking at your opponent's hand and shuffling a card from it back into the Deck. You could play more Flip Monsters like Guard Dog or Whirlwind Weasel because we could just pitch them for Cupsie Way or Star Ham’s effects if we draw them which means that we can bring them back during the End Phase with Tarotrei. 3 of each Yummy monster: 3 Cupsie☆Yummy, 3 Cooky☆Yummy, and 3 Lollipo☆Yummy. Each of them can Special Summon themselves from hand if you control a Level 2 Synchro or a LINK-1 monster, but you can only Special Summon them that way once per turn. They also have an effect that activates on Normal or Special Summon: Cupsie searches a Yummy Card or draw 1 card if Special Summoned by a Synchro Monster’s effect, Cooky targets a monster your opponent controls to drop its ATK by 1000 or destroy it if it was Special Summoned by a Synchro Monster’s effect, and Lollipo targets and shuffles a card from your opponent’s GY into the Deck or banishes it if it was Special Summoned by a Synchro Monster’s effect. Note that the different effect when they are Special Summoned by a Synchro Monster’s effect is optional and CAN be chosen instead of the original effect. I did consider only playing 2 Cooky and 2 Lollipo alongside 3 Engage, Hornet Drones, and a Kagari, but 3 of each Yummy name alongside Piri Reis Map works much much better. Although I am sure that ratios are subject to change if we ever do get more Main Deck Yummy names. 3 Mulcharmy Fuwalos, 3 Ash Blossom & Joyous Spring, and 3 Droll & Lock Bird.
For Spell/Traps: 3 Piri Reis Map, which at the start of your Main Phase 1 allows you to add a monster with 0 ATK from your Deck to your hand, halving your Life Points, but preventing you from activating the activated monster’s effects or the effects of cards with the same name until the end of the next turn until your Normal Summon that monster or a card with its name. Essentially, it searches Cupsie which searches another Yummy name, essentially giving you full combo. 3 Underworld Ritual of Prediction which can Ritual Summon a Prediction Princess Ritual Monster from hand or GY face-up or face-down and you can banish it from GY during the Standby Phase to Special Summon a non-Ritual Prediction Princess monster from Deck face-down. 1 Called by the Grave. 1 Crossout Designator. 1 World Legacy Monstrosity which can either Special Summon a Level 9 monster from your hand or target a Level 9 monster you control to Special Summon 2 Level 9 monsters from your Deck with a different type and Attribute, but with different names. 2 World Legacy Succession which targets a monster in your GY and Special Summons it to Linkpoint. It may seem weird to be playing 2 of this card when it is searchable and is not really an important card in our combo, but if we do open it, it and any Yummy name or any handtrap monster is full combo. Think: Normal Summon Ash Blossom, Link into Almiraj, Succession bring back Ash, and then Synchro into Cupsie Way. You could still just play 1 copy with the other being replaced with something like Triple Tactics Talent, a second Yummy☆Surprise for follow-up potential, or Yummysment☆Acrockie which can be activated from Deck on your opponent’s turn by Snatchy and allows you to target and destroy a card your opponent controls if you Synchro Summon a LIGHT Beast Synchro Monster. 1 Yummy☆Surprise which allows to pick between 3 different effects, each of which are once per turn. You can target 2 LIGHT Beasts you control and 2 cards your opponent controls to return all of them to hand, you can Special Summon a Yummy monster from hand or GY but it cannot attack directly this turn, or you can return a Field Spell from your face-up field or GY to your hand to place a different Yummy Field Spell from your hand face-up on your field. You are mainly just using this card to bring back a Yummy from GY in this Deck. 1 Yummysment☆Minion which gives your Yummy monsters 500 ATK for each LIGHT Beast monster on the field. If you control a LINK-1, it can target and Special Summon a Level 1 Yummy monster from your GY. And if it is in your GY, you can target 2 Yummy monsters in your GY and/or banishment to place them and this card on the bottom of your Deck. Finally, 3 Infinite Impermanence.
Extra Deck: 1 Trishula, the Dragon of Icy Imprisonmenet which can be Special Summoned by banishing 3 monsters you control with different names. 1 Ib the World Chalice Justiciar who searches for a World Legacy card from Deck on Synchro Summon. 2 Herald of the Arc Light which adds a Ritual Monster or Ritual Spell from your Deck to your hand if it is sent to the GY. 1 The Star Ham. 1 each of Cooky★Yummy Way, Lollipo★Yummy Way, and Cupsie★Yummy Way. Each can use a LINK-1 as a Level 1 Tuner, have an effect on Synchro Summon, and can return themselves from field to Extra Deck when your opponent activates a card or effect to Special Summon up to 2 Yummy monsters from your GY. Cooky Way targets up to 2 face-up monsters your opponent controls and changes them to face-down Defense on Synchro Summon. Lollipo Way can Special Summon 2 Yummy monsters from your GY with their effects negated on Synchro Summon. Cupsie Way can add 2 Yummy monsters from your Deck to your hand and discard a card on Synchro Summon. Note that in the combo I described in the beginning, the monsters you use to Special Summon Trishula are Lollipo Way and 2 Main Deck Yummy names. Technically, you can Synchro them into Herald of the Arc Light and then Synchro Ib with Herald into any Level 9 Synchro Monster (I would recommend Ravenous Crocodragon Archethys to draw 1 card to make up for the discards earlier in the combo). That triggers Herald for a Ritual search. And if you make Aggregator and send another Herald, that is a second Ritual search. Then, if you reattach both Heralds to Aggregator and Link it off into say a Gravity Controller, that gives you the third and fourth Ritual searches. Why aren’t we doing this? A situation where this line is the more optimal combo may come up, but it searches for more cards than we actually need since we are only playing 7 total Ritual Monsters and Ritual Spells in this Deck. Besides, it prevents us from making I:P Masquerena to go into S:P Little Knight on our opponent’s turn which, in turn, prevents us from giving ourselves more board space to do actual Yummy plays on our opponent’s turn. If you want to ditch the prospect of doing Yummy plays on the opponent’s turn in favor of going all in on Prediction Princess, just play Ravenous Crocodragon over I:P in the Extra Deck. It’s really your choice. 1 Mereologic Aggregator, 1 Laevateinn, Generaider Boss of Shadows, and 1 Jormungandr, Generaider Boss of Eternity. 1 S:P Little Knight and 1 I:P Masquerena. 1 Yummy★Snatchy which is a LINK-1 that requires a Level 4 or lower LIGHT Beast as material. On Special Summon, it can place a Yummy Field Spell from hand or Deck face-up on the field which prevents you from Link Summoning LINK-3 or higher monsters for the rest of the turn. And once per chain during your opponent’s turn, you can pay 100 Life Points to Quick Synchro a Synchro Monster using monsters you control including a Yummy monster. Finally, 1 Salamangreat Almiraj.
Side Deck: 3 Nibiru, the Primal Bring, 3 Mulcharmy Purulia, 2 Dark Ruler No More, 1 Lightning Storm, 1 Harpie’s Feather Duster, 3 Evenly Matched, and 2 Dimensional Barrier.