: Whenever a creature under your control dies, create a 1/1 black Skeleton creature token with "{B}: regenerate this creature"

+2: Add {B}{B}{B} to your mana pool. Spend this mana only on mana ability costs.

0: Create two 1/2 black Skeleton creature tokens with "When this creature dies, create a token copy of it and you lose 3 life"

-10: Exile any number of Skeletons from your graveyard. For each skeleton exiled in this way, create a 1/1 black Skeleton creature token with Indestructible