Hexerei
Zerstöre eine getappte Kreatur deiner Wahl. Du erhältst für jede fliegende Kreatur, die du kontrollierst, 1 Lebenspunkt dazu.
If the target creature is an illegal target by the time Aerial Assault tries to resolve, the spell doesn't resolve. You won't gain life. If the target is legal but is not destroyed (most likely because it has indestructible), you will gain life.