Lonco and his father had a fatal misunderstanding regarding the "Thundercloud Technique".
They believed that Noland Lee used this spell to summon both thunder and lightning energy and the thunderclouds themselves.
However, the magical thing that actually summoned the thunder and lightning energy was the Elemental Energy Reactor.
The "Thundercloud Technique" is merely a Shaping Energy Spell that shapes the thunder and lightning energy into thunderclouds.
In the eyes of Lonco and his father, each time an incapacitated Noland Lee, unable to cast spells or create Magic scrolls, handed over a "Thundercloud Scroll" from his inventory, his own strength would be diminished.
The actual situation was poles apart from their conjecture.
Noland Lee had plenty of Thunder and Lightning Energy, and he wasn't suffering from Mental Trauma.
It's just a "Thundercloud Scroll", right?
Here, take it.
As many as you want.