Master Roshi, Turtle Hermit

Spells you control have prowess(Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) and Cascade and Dredge 3.

Whenever Master Roshi attacks, exile target card with mana value less than Roshi's power from a graveyard and copy it. You may cast the copy without paying its mana cost.

If a spell was cast this way proliferate
age 453