Kaya, Spirits' Justice
Most planeswalkers that care about exile treat it as punishment: graveyard-eating and flicker effects that fuel removal in a white-black shell. This one inverts the relationship. Her triggered ability watches for any creature card that leaves your board or your graveyard for the exile zone, then stamps that card's identity onto a token you already control, flying attached. The plan threads across the loyalty ticks: the +1 manufactures the flying Spirit that wants to become something bigger, the +2 feeds the graveyard and the exile pipeline the trigger looks for, and the −2 exiles one of your own creatures alongside targeted removal that reaches up to one creature per opponent. That last mode is the quiet engine, because the creature you exile to it is precisely the creature the token becomes: the trigger and the removal are the same button, so a defensive answer and your copy-fuel arrive in a single activation. What makes the design distinct is that it asks you to build around your own exile rather than fear it, running a value loop through a zone most white-black decks only pass through in one direction. The copy is temporary (until end of turn) and the payoff is capped by how many Spirits you can float, so the ceiling scales with setup rather than raw loyalty, an unusual restraint for a four-mana planeswalker that could otherwise snowball unchecked.
