Spectral Arcanist

Snapcaster Mage recasts one spell from your graveyard by handing it flashback; this Spirit does something structurally different, casting the spell outright for free and scaling its ceiling to your board. The size of the recast is gated not by mana but by tribe: the more Spirits you control, the higher the mana value you can pull back, which turns a wide flying-Spirit board into a rising cap on what the graveyard can return. That is an unusual place to put a knob. Most graveyard recursion prices itself by the spell's own cost or by an exile tax; here the limiter is a creature count you build up over the game, so the same body that threatens damage in the air also raises the ceiling on your reanimation of instants and sorceries. The exile clause is the safety valve that keeps it from becoming a loop: the returned spell leaves the game instead of feeding a second Arcanist, so this is a one-shot burst of value tied to a fragile 3/2, not an engine you can grind indefinitely. It rewards a deck already committed to going wide on Spirits and holding a stocked graveyard, where the enters trigger cashes in a stored removal spell or draw spell at the exact moment you extend the board.