Fatestitcher

Most untappers ask you to keep them alive, which is exactly the wrong demand for a card whose whole value is a single point of leverage. This Wizard solves that by making its own death irrelevant: the tap-or-untap effect is the engine half, pointing at any permanent that produces mana or untapping a blocker to wall an attacker, and unearth is the insurance half. For one blue mana you buy the 1/2 back from the graveyard with haste, so the untap is live the instant it returns and you never have to protect the fragile body. The recursion fires once and then exiles: a second body the opponent must answer separately from the first, not an open loop. That disposability is the design idea. A creature you are happy to sacrifice on the board and reclaim from the bin is precisely the smallest moving part a deterministic mana engine wants, because every other untapper forces you to defend a creature that any removal spell shuts off permanently. Here the graveyard does the defending for you, and the haste turns the unearth into an immediate untap rather than a delayed one. Plenty of cards untap permanents; almost none make the untapper itself this cheap to throw away and this cheap to get back.