Keldon Champion is a uncommon Creature — Human Barbarian card from Planechase (HOP), collector number 58. Current market price: $0.05, TCGplayer market prices via Scryfall.
Haste Echo {2}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, it deals 3 damage to target player or planeswalker.