Timeless Vault

Timeless Vault enters tapped unless it entered
from the graveyard.

{t}: Add {b}.

Unearth — Discard a swamp. (Discard a
swamp: Return this card from your graveyard to the
battlefield. It gains haste. Exile it at the beginning
of the next end step or if it would leave the
battlefield. Unearth only as a sorcery.)