Nameless Thing

Deathtouch, Vigilance, Skulk
You may sacrifice 3 creature's instead of paying Nameless Thing's casting cost.
If you control 3 or more Mountains, Nameless
Thing gains +3/+3 and "{t}: Nameless Thing
deals 6 damage to target creature or planeswalker."
Sacrifice a creature: Creature's you control gain Deathtouch and Skulk until end of turn.