Everythingamajig is a rare Artifact card from Unstable (UST), collector number 147c. Current market price: $1.06 (foil $1.64), TCGplayer market prices via Scryfall.
{1}: Flip a coin. If you win the flip, add {C}{C}. Activate only as an instant. {3}, {T}: Target player discards a card. Activate only during your turn. {X}: This artifact becomes an X/X Construct artifact creature until end of turn.