Larannah, Voice of the Abyss

{3}{b},{t}: Summon target creature from any
graveyard. It's color becomes black and it gains
the demon and zombie creature types in addition
to its other types.
If Larannah, Voice of the Abyss dies, deal X
damage to all creatures, planeswalkers, and
players, where X is the amount of demons or
zombies you control.