Ryuudou Temple

Ryuudou Temple enters the battlefield tapped unless you control a Servant Caster creature.
{t}: Add {u} or {b} to your mana pool.
Cycling {u/b} ({u/b}, Discard this card: Draw a card.)
The temple sits atop a key leyline of Fuyuki, and with Caster's barriers is all but a fortress to those seeking entry.