Thane's Necropolis

{t}: Add {c}
{u}{b}{g}, Exile X creature cards from your
graveyard, {t}: Add X mana in any arrangement
of colours.
The vaults are filled with my augmented undead monstrosities, which are capable of both toppling a
plane in mere hours and throwing a tasteful dinner
party.
— Thane, Necromancer Savant