Time Sidewalk

A Time Walk token card is a sorcery with mana cost {1}{U} and the ability “Take an extra turn after this one.”

A player’s “opening hand” is the hand of cards the player has after all players have finished taking mulligans.

Unlike a normal token, a token card doesn’t cease to exist in a zone other than the battlefield. It’s both a token and a card. It can move between zones any number of times and continues to exist for the rest of the game.