Kaya, Geist Hunter

The −2 is where the design commits. Token doublers usually live on artifacts and enchantments that sit on the battlefield doing their work every turn: Doubling Season, Parallel Lives, Anointed Procession. Folding that same effect onto a planeswalker's minus ability changes the math entirely. It is a one-turn burst rather than a standing multiplier, so you pay up front, drop the ability, and cash it in the same turn on whatever token engine you already have running. The static-versus-activated distinction is the whole point: the doublers that stay on the battlefield reward slow accumulation, while this one asks you to line up your biggest token turn and pull the trigger once. The +1 is the connective tissue that keeps the card from being a doubler stapled to a body it does not want: deathtouch across your board turns a wide token army into a threat that trades up in combat, and the single +1/+1 counter it drops is aimed squarely at a token you control, which is the same population the ultimate rewards. That ultimate closes the loop by converting every card in every graveyard into a flying Spirit, a payoff that scales with a long game rather than a fast one. Everything on the card points at the same axis: make tokens, make them relevant in combat, and eventually turn the discard pile itself into an army.