Fiery Temper is a common Instant card from The List (PLST), collector number SOI-156. Current market price: $0.26, TCGplayer market prices via Scryfall.
Fiery Temper deals 3 damage to any target. Madness {R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)