I like Tearlament and I really like playing it. I enjoyed playing it at full power in the TCG with the Ishizu millers and shufflers and the Bystials and I also really liked the Ishizu Tearlament mirror match in Master Duel when it first came there. I even own a Zombie Tearlament Deck irl to scratch my itch to play both Zombie and Tearlament. When I first went over the entire list of Level 9 monsters in the game, I never really considered playing Tearlament with Prediction Princess even if Kaleido-Heart was a Level 9. I figured that the Deck would never work due to the fact that you couldn't really mill cards from the top of your Deck as you would risk milling cards like Underworld Ritual of Prediction, World Legacy Monstrosity, and Prediction Princess Bibliomuse along with other cards that we would much rather have in our hand or in the Deck. And I thought that Kaleido-Heart was just a meh target for Summoner of Illusions in Prediction Princess. Now I know that I was completely wrong. Tearlaments Prediction Princess really does work. It may not be the greatest variant of Prediction Princess, but it apparently does work to a degree, meaning that I can now cross off Kaleido-Heart on the list of Level 9 monsters in the game I need to experiment with. Tearlaments Kaleido-Heart is a Level 9 DARK Fiend Fusion Monster that requires Tearlaments Reinoheart and 2 Aqua monsters as Fusion Material. This is why I didn't think that Tear Prediction Princess would be able to work. You need a specific monster as Fusion Material along with 2 Aqua monsters where the only 3 Aqua Main Deck Monsters in the archetype are limited to 1 each. But as I looked more into what cards could actually help to facilitate Kaleido-Heart, I remembered Tearlaments Perlegia. If an Aqua Tearlaments monster is sent to your GY via a card effect, you can send a Level 4 or lower Aqua monster from your Deck to your GY, but if you sent a non-Tearlaments monster, you cannot activate cards or effects with the same name as that card for the rest of the turn. So, if you Normal Summon Reinoheart and use its effect to send an Aqua Tear name from Deck to GY while Perlegia is on field, you can send another Aqua monster from Deck to GY, you can Fusion Summon Kaleido-Heart right on the spot using the effect of the sent Tear name. So that all cumulates in your full combo being World Legacy Monstrosity + Tearlaments Reinoheart + Tearlaments Perlegia (or another Aqua monster in hand, field, or GY). Going back to Kaleido-Heart, he actually has a lot more uses than just being a Level 9 on field for Monstrosity. If he is Special Summoned or if an Aqua monster is sent to your GY by card effect while he's on field, you can target and shuffle a card your opponent controls into the Deck, and if he is sent to the GY by card effect, you can Special Summon him back and send a Tear card from Deck to GY. Since we are going to be using him to Xyz Summon Mereologic Aggregator, it's important to note that Aggregator detaches for effect. So when you are reattaching the Herald of the Arc Light you sent to GY when you Xyz Summoned it, you detach and send Kaleido-Heart to GY by card effect which then triggers his effect to bring himself back and dump a Tear card. From here, you have a couple of options. You can dump Tearlaments Sulliek for a search of a Tearlaments monster or you can send Tearlaments Scream to add a copy of Tearlaments Cryme from your Deck to your hand to have access to a Spell/Trap card or monster effect activation negate for your opponent's turn or you can add a copy of Sulliek to have a targeted monster effect negate which also sends a monster you control to GY which can trigger Kaleido-Heart to bring himself back and spin a card your opponent controls. Now, if you want another option in what you could do, you can send whatever to get whatever, but then, you can use Kaleido-Heart and the copy of Bibliomuse that you brought back from GY via its own effect and flipped up with Tarotrei in order to Xyz into Laevateinn, Generaider Boss of Shadows for interruption.
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 during the End Phase, she can Special Summon a Flip Monster from hand or GY face-down. Tarotreith must be either Ritual Summoned or Special Summoned via Tarotrei's End Phase effect. Her Flip Effect allows you to Special Summon a Flip Monster from Deck and she can also Quick Effect flip any number of your monsters face-up or face-down. If it was worthwhile to play Evoltile Pholis who can Special Summon an Evoltile from hand or GY face-down on Summon in Evoltile Westlo, I would be running 3 Tarotreith instead, but needing to get Pholis on field and have Westlo in hand or GY is just too much of a burden for me to consider it. Bibliomuse can Special Summon herself back from GY if she was tributed and sent there. Her Flip Effect adds a Prediction Princess other than herself and a Ritual Spell from Deck to hand, and while she is face-up on field, your Ritual Monsters gain targeting and destruction protection from your opponent's cards and effects. 2 Deus-X Krawler which negates all activated monster effects on your opponent's field after it has been flipped face-up and if it is destroyed on field, you can add a Level 9 monster with a differnet Type and Attribute than it from Deck. 1 Summoner of Illusions which is a Flip Monster you can get from Deck with Tarotreith. It has a mandatory Flip Effect to tribute 1 other monster you control to Special Summon a Fusion Monster from your Extra Deck, destroying it during the End Phase. Our options in this Deck are Naturia Exterio, Tearlaments Rulkallos (to be on-theme), Red-Eyes Dark Dragoon, and Predaplant Dragostapelia. Note that it Tributing 1 other monster is not done for cost. It is done as a part of the effect which means that you could technically trigger Kaleido-Heart by tributing it and sending it to GY as he will be Tributed and sent there by a card effect. For the Tearlament monsters: 3 Tearlaments Reinoheart and 1 each of the limited Tearlaments Scheiren, Tearlaments Havnis, and Tearlaments Merrli. Reinoheart sends a Tearlaments monster other than himself from Deck to GY on Normal or Special Summon, and if he is sent to GY by card effect, you can Special Summon him back and send a Tearlaments card from hand or GY, banishing him when he leaves the field. For the other Tear names, we are not using their own respective effects because it really does not apply in this Deck. We just need their effect which allows you to Fusion Summon a Fusion Monster by placing the materials, including itself, from hand, field, and/or GY on the bottom of your Deck if they are sent to the GY by card effect.
For Spell/Traps: 1 Instant Fusion for Master of Ham. 3 Pot of Prosperity. 3 Underworld Ritual of Prediction which Ritual Summons a Prediction Princess Ritual Monster from hand or GY face-up or face-down and you can also banish it from GY during the Standby Phase in order to Special Summon a non-Ritual Prediction Princess monster from Deck face-down. 1 Terraforming. 3 Tearlaments Perlegia and 1 Primeval Planet Perlereino. Both give your Tearlament monsters and Fusion Monsters 500 ATK. Perlegia, if an Aqua Tear monster is sent to your GY by card effect except during the Damage Step, you can send a Level 4 or lower Aqua monster from Deck to GY, but you cannot activate cards or effects with the same name for the rest of the turn if you sent a non-Tearlaments monster. Perlereino adds a Tearlaments monster or Visas Starfrost on activation and if a Tear monster(s) is returned from field or GY to the Deck or Extra Deck, ou can target and pop a card on field. We need Perlegia for our combo while Perlereino is just a search, and because of that, we don't need to really max out on Perlereino. 2 Tearlaments Scream which we are only using for its GY effect which adds a Tearlaments Trap from your Deck to your hand if it is sent to GY by a card effect. 2 Foolish Burial Goods and 1 Foolish Burial. 3 World Legacy Monstrosity which can either Special Summon a Level 9 from hand or target a Level 9 you control and Special Summon 2 Level 9 monsters from your Deck with a different Type and Attribute but with different names. 1 Reinforcement of the Army. 2 Tearlaments Sulliek, and 1 Tearlaments Cryme.
Extra Deck: 1 Naturia Exterio, 1 Tearlaments Kaleido-Heart, 1 Tearlaments Rulkallos, 1 Red-Eyes Dark Dragoon, 1 Predaplant Dragostapelia, and 1 Master of Ham. 1 Herald of the Arc Light for a Ritual Search. 1 Divine Arsenal AA-ZEUS - Sky Thunder. 2 Mereologic Aggregator. 1 Laevateinn, Generaider Boss of Shadows and 1 Jormungandr, Generaider Boss of Eternity. 1 S:P Little Knight, 1 I:P Masquerena, and 1 Gravity Controller.
Side Deck: 3 Nibiru, the Primal Being, 1 Kurikara Divincarnate, 1 Harpie's Feather Duster, 2 Lightning Storm, 2 Triple Tactics Talent, 3 Evenly Matched, and 3 Infinite Impermanence.