Crown of Vigor is a common Enchantment — Aura card from Onslaught (ONS), collector number 253. Current market price: $0.11 (foil $0.84), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +1/+1. Sacrifice this Aura: Enchanted creature and other creatures that share a creature type with it get +1/+1 until end of turn.