Typhon, The First Vault Hunter

When Typhon enters the battlefield, create a legendary colorless artifact Vault token ("When this token leaves the battlefield reveal each card exiled underneath it and return them to their owners hand, each player may cast cards returned this way without paying their mana cost until end of turn.")

Landfall - Whenever a land you control enters the battlefield, you may look at target opponents hand, choose a card. Exile that card face down under a Vault token.