Aion, Infernal Garrison

Fortified land is indestructible.
{2}{b}{b}: Fortified land becomes a X/X black
Nightmare creature with flying until end of turn.
X is equal to the number of creatures in your
graveyard. It's still a land.
Fortify {2}
Sometimes, you gotta call upon the darkest depths to
get the defenses you need.