Burning Abyss

Burning Abyss decks employ fiend-type monsters with powerful graveyard effects. Since many rely on not controlling spells/traps, Abyss decks are almost exclusively made of monsters, and they don't contain many duplicates, letting you access powerful cards like "Orbital Hydralander" that reward you for diversifying your theme.

Your goal is to stock your graveyard with as many members as possible, accessing their graveyard effects and overwhelming foes with your self-reviving cards. As icing on the cake, Abyss units aren't especially reliant on the extra deck, making them surprisingly affordable for such a competitive structure.