Calix, Destiny's Hand is a mythic Legendary Planeswalker — Calix card from Theros Beyond Death Promos (PTHB), collector number 211p. Current market price: $1.71 (foil $2.38), TCGplayer market prices via Scryfall.
+1: Look at the top four cards of your library. You may reveal an enchantment card from among them and put that card into your hand. Put the rest on the bottom of your library in a random order. −3: Exile target creature or enchantment you don't control until target enchantment you control leaves the battlefield. −7: Return all enchantment cards from your graveyard to the battlefield.