Esper Battlemage is a uncommon Artifact Creature — Human Wizard card from Shards of Alara (ALA), collector number 40. Current market price: $0.17 (foil $0.30), TCGplayer market prices via Scryfall.
{W}, {T}: Prevent the next 2 damage that would be dealt to you this turn. {B}, {T}: Target creature gets -1/-1 until end of turn.