the great leviathan yugioh card amazon Yu-Gi-Oh - GENF-EN039 this card gains 500 ATK Fabled Leviathan - Hidden Arsenal:

Thats perfect for recurring pieces like Sol Ring, Ichor Wellspring, or combo cogs like Grinding Station

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Giving all your artifacts ward can make your opponents removal spells much less mana effective and will start to make your other opponents targets look a lot more appealing

It also has solid base HP on Infernape E4 that lets it dodge Knock Outs from 80 damage attacks

The Mindskinner #66 Duskmourn: House of Horror Change Version The Mindskinner Legendary Enchantment Creature Nightmare The Mindskinner can't be blocked

With any number of ways to add +1/+1 counters to Treskelion, you can very easily keep the pain coming endlessly until your opponent is out of the game