Wilhelt, the Rotcleaver [Innistrad: Midnight Hunt Commander] Bird Mutant you may pay 0 rather

you may pay 0 rather than pay the mana cost for a colorless spell you cast from your hand

T: Add U or R

Set: Mystery Booster 2 Type: Legendary Creature — Human Soldier Rarity: Rare Cost: {2}{G}{W} {T}: Search your library for a legendary card

Set: Ravnica Remastered Type: Sorcery Rarity: Rare Cost: {B}{R} Destroy target creature or planeswalker

Set: The Lost Caverns of Ixalan Commander Type: Artifact Rarity: Uncommon Cost: {2} You have no maximum hand size

Wilhelt, the Rotcleaver [Innistrad: Midnight Hunt Commander] Bird Mutant you may pay 0 ratherSet: Innistrad: Midnight Hunt Commander Type: Legendary Creature Zombie Warrior Rarity: Mythic Cost: {2}{U}{B} Whenever another Zombie you control dies, if it didn't have decayed, create a 2 2 black Zombie creature token with decayed. (It can't block. When it attacks, sacrifice it at end of combat.) At the beginning of your end step, you may sacrifice a Zombie. If you do, draw a card.