The Big Idea is a rare Legendary Creature — Brainiac Villain card from Unstable (UST), collector number 76. Current market price: $0.27 (foil $0.59), TCGplayer market prices via Scryfall.
{2}{B/R}{B/R}, {T}: Roll a six-sided die. Create a number of 1/1 red Brainiac creature tokens equal to the result. Tap three untapped Brainiacs you control: The next time you would roll a six-sided die, instead roll two six-sided dice and use the total of those results.