Mayael's Crusader

Cascade into creature (When you cast this spell, exile cards from the top of your library until you exile a creature 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.)
Whenever another creature with power 5 or greater enters the battlefield under your control, Mayael's Crusader deals 2 damage to each creature. Creatures dealt damage this way gain haste until end of turn.