Six-Sided Die is a common Instant card from Unfinity (UNF), collector number 378. Current market price: — (foil $4.93), TCGplayer market prices via Scryfall.
Choose target creature. Roll a six-sided die. 1 — It has base toughness 1 until end of turn. 2 — Put two -1/-1 counters on it. 3 — Six-Sided Die deals 3 damage to it and you gain 3 life. 4 — It gets -4/-4 until end of turn. 5 — Destroy it. 6 — Exile it.