A-Dragon's Rage Channeler is a uncommon Creature — Human Shaman card from Modern Horizons 2 (MH2), collector number A-121.
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, Dragon's Rage Channeler gets +2/+0, has flying, and attacks each combat if able.