Magmatic Channeler is a rare Creature — Human Wizard card from Zendikar Rising Promos (PZNR), collector number 148s. Current market price: — (foil $0.46), TCGplayer market prices via Scryfall.
As long as there are four or more instant and/or sorcery cards in your graveyard, this creature gets +3/+1. {T}, Discard a card: Exile the top two cards of your library, then choose one of them. You may play that card this turn.