Rakdos Headliner is a uncommon Creature — Devil card from Modern Horizons 2 (MH2), collector number 210. Current market price: $0.19 (foil $0.20), TCGplayer market prices via Scryfall.
Haste Echo—Discard a card. (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.)