mtg graveyard commander deck The Necrobloom EDH | Landfall frame card of rarity Rare or higher and 1 Traditional Foil alt Modern Horizons 3 Graveyard Overdrive

A Collector card (borderless or showcase) can sometimes replace a card of the same rarity

If you want to really have a ton of options of creatures to take Maddening CacophonyMaddening Cacophony is particularly good, milling half of all of your opponent's decks giving you a smorgasbord of creatures to steal

The 0/1 body of the black Wizard token cant do much but chump block on its own, but its ability allows you to burn out players with a flurry of spells

I like user Gentleman_Jaggis idea of defense battles have to be defended by their caster until they reach a certain condition, and war battles which have more universal effects and somehow end up throwing all players into the conflict