At the beginning of each end step, put a slime counter on each creature you don't control. Creatures you don't control get -1/-1 for each slime counter on them. Whenever a creature you don't control with a slime counter on it dies, create a 1/1 black Slug creature token. {U}{B}, Sacrifice a Slug: Draw a card.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

{T}: Add one mana of any color in your commander's color identity.

{T}: Add {C}. {T}: Add {U} or {B}. This artifact deals 1 damage to you.