If a unit is targeted by a damage effect while at a battlefield, but moves to the base in response (using Fight or Flight), does the damage effect still resolve?

Ruling: The unit should not take damage. When a unit moves from the battlefield to the base in response to a damage effect that targets "a unit at a battlefield," the effect should not resolve because the unit is no longer at a valid location.

Nuances:

• The Pixelborn interaction described was a bug; the correct ruling is that the damage should not apply once the unit has moved.