Oath of Nissa

A one-mana enchantment doing two unrelated jobs at once, and the second is the quiet one that mattered. The dig is the obvious half: filter three deep for a creature, land, or planeswalker, a reliable green source of selection that almost always hits in a deck built to find them. But the static line beneath it is the design pivot. Letting any mana pay for planeswalker spells turns a green enchantment into universal walker fixing, the wrinkle that erases an otherwise punishing color requirement and lets four- and five-color superfriends shells slam Planeswalkers off whatever lands happened to come up. The dig is deliberately narrow to keep it fair: it only surfaces a creature, land, or planeswalker, so a hand clogged with removal or counterspells gets no help, and the reveal is a peek at three, not a tutor into your deck. What makes it singular is the pairing itself: a humble card-selection trigger riding on the same permanent as a manabase-cheating static ability that has nothing structurally to do with it. One permanent fills two slots in a planeswalker deck, the engine that finds the threats and the engine that lets you cast them regardless of color. That kind of stapling, two effects that share a card without sharing a logic, is unusual; most enchantments that fix mana do only that, and most that filter do only that.