Temple of Serenity

{t}: Add {w} or {u} to your mana pool.
{t}: Add 2 mana in any combination of {w} and {u} to your mana pool. Spend this mana only to cast Monk creature spells.
Monk creatures you control cost {1} less to cast, gain +1/+1, and cannot be removed from the battlefield by effects that say "destroy" (exile and damage are unaffected).