[Mad Thunder and Heavenly Waterfall], as a relatively rare Seventh Order spell, had an extremely strong penetrative power as its most distinguishing feature!
Skuru's drone swarm generally boasted high magic resistance, and the chassis could activate "micro-deflective force field shields," resulting in high physical resistance as well. Damage from various elemental spells such as fire, water, earth, and thunder was minimal against the drones, and only the Space System's [Dimensional Slash] caused moderate damage, but it was not prominently efficient in shooting down enemy aircraft.
The Seventh Order spell [Mad Thunder and Heavenly Waterfall] was an exception!
This spell's unit energy density was undoubtedly the highest among Seventh Order range spells, capable of effectively piercing through the drones' magic-resistant shells and directly burning out the internal electronic components.