Dragon's Rage Channeler is a uncommon Creature — Human Shaman card from Modern Horizons 2 (MH2), collector number 121. Current market price: $1.17 (foil $2.09), TCGplayer market prices via Scryfall.
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.