Savos Aren, Archmage

Instant and sorceries you cast have Replicate {u/r}{u/r} (When you play this spell, copy it for each time
you paid its replicate cost. You may choose new targets
for the copies)
As long as Savos Aren, Archmage is in your graveyard, instant and sorceries in your graveyard
have Flashback {u/r}{u/r} (You may cast this card from
your graveyard for its flashback cost. Then exile it.)
"What you learn here will last you a lifetime —
several, if you're talented."