What does Azir Ascendant's ability have to target on finalization?

On finalization, Azir, Ascendant's ability needs to target one unit you control.

Here's the breakdown:

1. The target: "Choose a unit you control" — per Rule 355.5 and 355.7, "choose" = targeting. You pick one friendly unit as the target when finalizing the ability on the chain.

2. Move destinations: Rule 355.4 says to choose a valid Location as a Move Destination for each move, but Azir's ability doesn't let you independently pick them. The destinations are defined by game state: "its location" (where the chosen unit is) and "my original location" (where Azir is). Per Rule 359.3.f.2, location references like "here" are checked on execution (resolution), not finalization — so those aren't separate targeting choices during finalization.

Summary: You choose one unit you control as the target on finalization. That's it. The swap locations are determined at resolution based on where that unit and Azir currently are — if someone reacts by moving either one, the swap destinations adjust accordingly.