Plasma Caster is a rare Artifact — Equipment card from Fallout (PIP), collector number 592. Current market price: — (foil $1.58), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+1. Whenever equipped creature attacks, you get {E}{E} (two energy counters). Pay {E}{E}: Choose target creature that's blocking equipped creature. Flip a coin. If you win the flip, exile the chosen creature. Otherwise, this Equipment deals 1 damage to it. Equip {2}