Black Marker

{t}: Add 1 mana of any color.
{4}{b}, {t}, Sacrifice Black Marker: Target player
discards a card and puts the top 5 cards of their
library into their graveyard.
Convergence 9 (If this card is in your graveyard,
you may exile it and 9 other creature cards from your
graveyard. If you do, create a 0/0 black Zombie
creature token with 9 +1/+1 counters on it.
Activate only as a sorcery.)