Realmwalker

Green's card advantage usually comes with a tax attached: a huge body, a stack of mana, a build-around you commit the whole deck to. This solves the tribal-tempo problem instead. Naming a creature type on entry lets you tap into whatever the deck runs (Elf, Goblin, Dragon, whatever the shell is built around), and every creature of that type on your library's peak becomes castable outside your hand, though you still pay its mana cost. That stretches the threat count from the top of the deck rather than the grip, so the pilot keeps drawing gas while the hand stays full of other things. The changeling line adds a quieter second layer: because this creature carries every type at once, it always shares a type with the tribe it feeds, so it sits among the payoffs of its own lords and anthems rather than off to the side of them. The permanent peek does real work too, since the pilot always knows whether the coming card is worth waiting for or something to shuffle away with a fetch or a draw step. The engine stays honest because its lane is narrow: it casts only creature spells of the chosen type, never cracking open into raw card draw the way a repeatable Divination would, and a noncreature card sitting up top stalls the whole thing until something moves it. The lineage runs closer to Vizier of the Menagerie and Descendants' Path than to any draw spell, but the untethered tribe and the constant look hand the pilot a timing control those older effects never offered.