Time Stone

{2}{t}: Put a Past Counter on All Cards. {5}{ut}: Return all Cards without a Past or Present Counter on them to their Owners Hand put all Cards with Present Counters into their Owners Graveyard Return all Cards Exiled with Time Stone onto the Battlefield. When you Untap Remove all Past and Present Counters. If there is
a Past Counter on Time Stone and; a Card is Destroyed or Exiled, Exile it with Time Stone Instead; or a Card is Cast or Returned from the Graveyard put a Present Counter on it.