Silver Jedi Everwatcher

Silver Jedi Everwatche can be played from the
hand for no cost if the player exiles an Aelvar
Archer on their field or in their hand.
While Silver Jedi Everwatcher is on the field, if
the opponent would summon a card from their
deck or spawn a Token card, the controlling
player can pay {g}{g} to negate that summon. The
card whose ability the opponent used is exiled.