Jack-in-the-Mox is a rare Artifact card from Unglued (UGL), collector number 75. Current market price: $7.31, TCGplayer market prices via Scryfall.
{T}: Roll a six-sided die. This ability has the indicated effect. 1 — Sacrifice this artifact and you lose 5 life. 2 — Add {W}. 3 — Add {U}. 4 — Add {B}. 5 — Add {R}. 6 — Add {G}.