Dragons Rage Channeler 121 (Modern Horizons 2)

Whenever you cast a noncreature spell, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.) Delirium — As long as there are four or more card types among cards in your graveyard, this creature gets +2/+2, has flying, and attacks each combat if able.

NM - $2.93
LP - $2.34
MP - $1.60
HP - $1.06
DMG - $0.53