Monivus, Metamagic Master

Spell Mastery — {2}: The next instant or sorcery
you cast this turn gains one of the following abilities: Flash, Storm, Cipher, Rebound,
Buyback {0}, Replicate {1}, Overload {2}, Support 3, Surveil 4, Ripple 5, Lifelink, Deathtouch, Delve, Convoke, Cascade, Proliferate, Populate, Retrace, Manifest or Split Second. You may activate this ability only if you have two or more instant or sorcery spells in your graveyard.