Polis the Planeshifter is a mythic Legendary Creature — Azra Wizard card from Unknown Event (UNK), collector number MR01. Current market price: $136.62, TCGplayer market prices via Scryfall.
When Polis the Planeshifter enters the battlefield, choose a plane at random from among all planechase planes. Polis the Planeshifter has all abilities of the last chosen plane. (Rolls of the planar die don't affect Polis.) {W}{U}{B}{R}{G}: Flip a coin. If you win the flip, do Polis the Planeshifter's chaos ensues effect. If you lose the flip, choose a new plane for Polis the Planeshifter.