Karl the Caffeinated

Haste
Whenever Karl attacks, the next spell you cast
this turn gains Historic Cascade. (When you cast
the spell, exile cards from the top of your library
until you exile a Historic nonland card that costs
less. You may cast it without paying its mana cost.
Put the exiled cards on the bottom of your library in a random order.)
Mundane of Sir Dreadbaron Torg