Selvala, Eager Trailblazer

The mana ability is doing something quietly novel: instead of counting creatures, it counts distinct power values across your board, so a wide army of identical tokens produces exactly one mana while a scattered, differently-sized board produces a lot. That is a mana engine that rewards variety over quantity, and it sits in odd tension with the token half of the card, which spits out an endless run of 1/1 Mercenaries that all share the same power. The Mercenary tokens themselves are the fix: each can pump a creature by +1/+0 at sorcery speed, so you spend a few taps to spread your power values apart and feed the second ability more colored mana on a later turn. The whole card is a loop that turns a homogenous board into a heterogenous one to extract ramp from the difference. Every creature you cast widens the token swarm, the swarm re-sculpts your power distribution, and the distribution powers out the next spell. It is a green-white legend built for creature-dense decks that want to keep casting, with a 4/5 vigilance body that stays back for the tap ability while still attacking. The bar to clear is deckbuilding discipline: a pile of one-drops all sized the same taps for a single mana, so the payoff belongs to boards that come in a range of sizes.