Door to the Sacred Realm

Take an extra turn after this one, then you forfeit
a turn for each extra turn you've taken. Damage
can't be dealt this turn. Spells you cast this turn
cost {1} less to cast. Whenever you cast a spell this
turn, exile the top card of your library. You may
cast those cards. Whenever you cast a spell exiled
this way, you gain 2 life.