Striker

Trample
Class Promotion Ranger (You may cast this spell by sacrificing a Ranger and pay it's mana cost reduced by that creature's converted mana cost.)
When Striker entres the battlefield, search your library for a card named Siege Kit, reveal it, and put it into your hand, then shuffle your library.
{1}{b}{r}, {t}: Striker deals X damage divided as you choose among any number of target creatures and/or players. Where X is its power.