Essence Flare is a common Enchantment — Aura card from Coldsnap Theme Decks (CST), collector number 69. Current market price: $0.17, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+0. At the beginning of the upkeep of enchanted creature's controller, put a -0/-1 counter on that creature.