Each creature is black in addition to its other colors.
Whenever a black creature you control dies, you may exile it. If you do, create a token that's a copy of that creature, except it's 1/1 and it's a Shadow in addition to its other types.
Whenever a 1/1 black creature you control dies, draw a card.
It is not a pleasant time when the Corpse Moon is up in the sky. Everything living becomes undead and mindless, it's absolute madness.