Oko, Lord of the Fae is a mythic Legendary Planeswalker — Oko card from Alchemy: Reality Fracture (YFRA), collector number 1.
Creatures can't attack planeswalkers you control unless their controller pays {1} for each of those creatures. +1: Up to one target artifact or creature loses all abilities until your next turn. −1: Create a 2/2 white Ox creature token. −7: You get an emblem with "At the beginning of your upkeep, conjure a random planeswalker card into exile. You may cast that card this turn without paying its mana cost."