Archmage's Newt is a rare Creature — Salamander Mount card from Outlaws of Thunder Junction (OTJ), collector number 39. Current market price: $0.19 (foil $0.35), TCGplayer market prices via Scryfall.
Whenever this creature deals combat damage to a player, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. That card gains flashback {0} until end of turn instead if this creature is saddled. (You may cast that card from your graveyard for its flashback cost. Then exile it.) Saddle 3