Shielding Plax is a common Enchantment — Aura card from Ultimate Masters (UMA), collector number 222. Current market price: $0.19 (foil $0.35), TCGplayer market prices via Scryfall.
({G/U} can be paid with either {G} or {U}.) Enchant creature When this Aura enters, draw a card. Enchanted creature can't be the target of spells or abilities your opponents control.