Buggeye, Mad Alchemist

At the beginning of each player's end step, that player may flip a coin and choose heads or tails. If they win the flip, they create a Treasure token. If they lose the flip, each player creates a Treasure token instead.

{3}{u}{b}{r}, {t}, Sacrifice an artifact: Exile the top card of your library for each opponent. Reveal those cards. Each opponent loses life equal to the total
mana value of any artifact cards revealed this way.