Violent Eruption is a uncommon Instant card from The List (PLST), collector number TOR-117. Current market price: $0.13, TCGplayer market prices via Scryfall.
Violent Eruption deals 4 damage divided as you choose among any number of targets. Madness {1}{R}{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.)