Gloaming Spire

Gloaming Spire enters the battlefield tapped.
{t}: Add {c}{c} or {e}{e}.
{ut}: Sacrifice an artifact creature.
It hurts us all to watch you suffer,
Submit, and ail no longer.
Approach and join, and be compleat;
Submit, and you'll be stronger.
—Mantra, Priests of Norn