Champion's Helm is a rare Artifact — Equipment card from Fallout (PIP), collector number 482. Current market price: $2.72 (foil $2.52), TCGplayer market prices via Scryfall.
Equipped creature gets +2/+2. As long as equipped creature is legendary, it has hexproof. (It can't be the target of spells or abilities your opponents control.) Equip {1}