Graveyard Fumes

Descend (If you have ten or more creature cards in
your graveyard, you get the crypt's hex for
the rest of the game.)
Each non-Zombie creatures gets -X/-X until end
of turn.
If you have the crypt's hex, return a creature
card put into a graveyard this way to the
battlefield under your control. It's a black
Zombie in addition to its other colors and types.