Soul of Migration

Evoke is the lineage marker here, and it runs straight back through Mulldrifter: a permanent whose enters ability is the whole point, with evoke letting you pay only for the trigger when the body is surplus to requirements. Where Mulldrifter cashed the trigger for cards, this one cashes it for a board, three flying bodies at full cost (the 2/4 plus two 1/1 Birds) or, at the reduced evoke price, the two Birds while the Elemental is sacrificed on entry. That sacrifice is the design, not a downside. Most evoked creatures leave nothing behind, so you are paying purely for a trigger; this one leaves two flyers every time, which is what keeps the evoke line from feeling like a tax. And the sacrifice feeds the decks that want a creature in the graveyard anyway: reanimation targets, sacrifice payoffs, delve fuel. The trigger builds the board, the evoke cost drops a body into the yard, and neither half is wasted. Note the timing constraint, though, because it shapes how the card actually plays: evoke is an alternative cost, not a grant of flash, and this is a creature without flash. Every casting happens at sorcery speed, on your own turn. There are no surprise blockers here and no instant-speed reanimation primer; the value is real but it is telegraphed, paid for on the main phase like any other creature spell.