Infernity TCG

This deck is insanely strong going first, but also going second isn't that bad because of how the discarding cost of forbidden droplet can be a benefit.

Important note: always make sure that you have all your spells/traps on the field rather than in your hand because the infernity cards' effects only work when you don't have any card in your hand.

Going first:

Ideally, you'd want to have Tour Guide in your starting hand, as she's able to summon Fiendish Rhino from the deck, that can send any fiend monster from the deck to the GY. At this point you must make sure to empty your hand, but the deck has enough tools to make sure that this will happen, as cards like Void Apocalypse, One for One, Infernity Wildcat, Infernity Patriarch or Forbidden Droplet (this one only when going second though) all bring you benefits for the cost of discarding, or special summon themselves (Patriarch) if you don't have any other cards in your hand. Once you emptied your hand, use Tour Guide And Fiendish Rhino to link summon Cherubini, and activate Fiendish Rhino's effect from the GY. If you have any spell that lets you special summon a monster from your GY (Monster Reborn, This Creepy Little Punk, Infernity Launcher, ZERO-MAX, World Legacy Succession) send Infernity Archfiend to the GY (note: you can also send Infernity Sage instead of Infernity Archfiend, because when sent to the GY, he can send any Infernity card from the deck to the GY too, letting you send Archfiend too (but Sage's GY effect can only activate if your hand is empty, be careful)). After successfully sending Archfiend to the GY, activate Cherubini's effect to send Infernity Necromancer to the GY. Good thing about Cherubini is that, neither Ash Blossom, nor Infinite Impermanence can cancel this effect, since it's only a cost. After setting up the GY, use the spell that you drew (Monster Reborn, This Creepy Little Punk, Infernity Launcher, ZERO-MAX, World Legacy Succession) to special summon Infernity Necromancer from the GY. Then activate Necromancer’s effect to summon Infernity Archfiend from The GY too and use its effect to add Infernity Patriarch from the deck to your hand (only if you haven't used Patriarch's effect already earlier). Summon him from the hand with his own effect and use him and Infernity Archfiend to xyz summon Dugares from the Extra Deck. He lets you special summon Archfiend from the GY again.
You may have realized by now, but what we try is to summon Infernity Archfiend again and again because each time he's summoned, you can search any Infernity card from the deck. This time, we search Infernity Mirage to add to our hand. Now use all your 4 monsters to link summon Saryuja from the Extra Deck. When Saryuja is summoned with 4 monsters, you can draw 4 and add 3 cards back to the deck. Make sure to not send Infernity Mirage to the deck, and also make sure that the other card you keep is a spell/trap. Set the spell/trap and then activate saryuja's effect to special summon Mirage from your hand. You can instantly use mirage's effect to send himself to the GY and special summon 2 Infernity monsters from the GY. The targets will be Necromancer and Archfiend. At Archfiend's summon, add Infernity Paranoia from the deck. Activate Mirage's effect, to summon Patriarch from the GY. Then, activate Infernity Paranoia, to sacrifice Necromancer and special summon Infernity Wildcat from the deck (his effects are negated). Now use Saryuja as a material to summon World Sea Dragon Zealantis from the Extra Deck. Use Zealantis' effect to banish all your monsters and rearrange them on the field (order is not that important except that you should summon Zealantis below an extra monster zone, AND ALSO SUMMON PATRIARCH IN ATK POSITION, EXPLANATION LATER). This will trigger Archfiend's effect to search This Creepy Little Punk. Also Wildcat's effect isn't negated anymore. Activate wildcat's effect by banishing Mirage from the GY to increase its lvl by 1 (it’s important that you banish Mirage and not any other Infernity monster, since mirage can’t be special summoned from the GY but can be special summoned while being banished). Use Wildcat and Archfiend to synchro summon Accel Synchro Stardust Dragon into the extra monster zone. Activate Accel Synchro Stardust Dragon’s effect to special summon Infernity Sage from the GY and then use both to synchro summon Bystial Dis Pater (Not INTO AN EXTRA MONSTER ZONE!). Use Bystial Dis Pater’s effect to special summon the banished Infernity Mirage. Then use Mirage’s effect to special summon Necromancer and Archfiend again. Use Archfiend’s effect to add Infernity Launcher. Next, use Zealantis and Archfiend as material to link summon Knightmare Phoenix into an extra monster zone. Now that Archfiend is in the GY, you can activate Necromancer’s effect again to summon Archfiend and activate its effect to add Infernity Barrier to your hand. Now use Knightmare Phoenix, Infernity Necromancer and Infernity Archfiend to Link summon Apollousa. The next step is to activate Infernity Launcher and send it to the GY to special summon Necromancer and Archfiend once again. At Archfiend’s summon you’ll add another Infernity Barrier to your hand. Use Necromancer’s effect to special summon Infernity Wildcat from the GY and then use Wildcat, Necromancer and Archfiend as Synchro material to Synchro summon Chengying. The last step is to activate This Creepy Little Punk in order to special summon Necromancer again. Use its effect for the last time to summon Archfiend in attack position, and use Archfiend’s effect to search Infernity Break.

Your endboard now consists of 2 omninegates (2x Infernity Barrier), Monster negates that let you negate up to 4 monster effects (Apollousa can negate up to 3 effects and Bystial Dis Pater can negate a monster effect or destroy it on a once per turn) and two removals (Infernity Break and Chengying, which work perfectly together because when you activate Infernity Break to destroy a card on your opponent’s field, it will banish a card as a cost, meaning that you can also activate Chengying’s effect after the effect has resolved).

The reason why we want Patriarch and Archfiend in attack position is that you can only activate Infernity Barrier when you control an attack position Infernity monster. If we only controlled one attack position Infernity monster, our opponent could just summon a monster with more ATK, directly go into the battle phase, destroy our Infernity monster, and then use his spells/traps to break our board, cause we wouldn’t be able to activate Infernity Barrier anymore.