Tamiyo, Compleated Sage

The Phyrexian mana pip in the middle of the cost is the whole design conversation, and it is doing something subtler than the usual "pay life for tempo" bargain. Compleation makes the hybrid pip castable with green, blue, or two life, but paying the life tax costs two starting loyalty, turning a five-mana planeswalker into a three-loyalty one. That is a real risk on a walker whose +1 protects itself only by tapping down a single attacker, not by generating a blocker or removing a threat. The math bends toward casting it clean when you can and eating the loyalty hit only when the board rewards the rush. The -X reanimation-into-token ability is the actual engine: it does not return the card, it exiles it from your graveyard and stamps out a copy, so the loyalty spent scales with what you are copying and the original never gets a second use. And the -7 does not close the game by attacking or by fielding an army; it hands you Tamiyo's Notebook, a cost-reducer and card-draw artifact that outlives the walker, meaning the ultimate is a hard pivot from planeswalker to permanent engine. Three abilities, three different jobs, all bought with a loyalty economy that the compleation pip lets you frontload or preserve depending on what the board demands.