Sephinus, Angel of Infinity

Flying
When Sephinus, Angel of Infinity enters the
battlefield or attacks, exile any number of
multicolored cards from your graveyard. You
may play those cards until the start of your next
turn.
Whenever you gain life, add one mana of any
color. Spend this mana only to cast spells exiled
with Sephinus, Angel of Infinity. This mana isn't
lost as phases end.