Endless March

You may cast spells that are or that can create
tokens with the Graveborn, Shade, Skeleton,
Specter, Vampire, Wraith, and Zombie cards
from Exile if you pay and additional {b} and 1 life
If you have a Commander o in play, may pay
{2} for each time you have cast it from your
command zone. Once you do, you may also
cast such cards from your graveyard.
"Fist rule undead apocalypse, kill the necromancer.
Second, keep doing that."