Vessel of Urugoth

This creature costs one less to cast for every
creature in a graveyard.
{t}: Sacrifice this creature and search your library for a creature card named "Urugoth, Liberated", put
it on the battlefield and shuffle your library. Only
do this if your devotion to black is more than 7.
"[...] And with the shouts of a thousand souls, the
great Urugoth will awake from it's slumber and slain
the wicked."
- Psalm 19-2