If Foxfire targets a unit with 4 or less total might, but the opponent responds by giving that unit +2 might (making it 6 total), does Foxfire still kill the unit or does the target become invalid?

Ruling: The target becomes invalid and Foxfire will not resolve. The kill should not happen.

Nuances:

• This interaction is bugged on Pixelborn, where Foxfire incorrectly still kills the unit even after it exceeds the might threshold