To be honest, Riya was sure that this situation didn't only happen to her but also many other people. Because the mana consumption also depended on their efficiency on the spell itself.
The spell word they said was nothing more than a trigger.
In fact, if they were powerful enough, they could initiate the mana according to the movements and route made through the magic spell words without saying it. This was the one called instant skill.
But not everyone could do it.
Because without using any spell at all, they would have to control the mana themselves inside their body. This required both high control of mana and also great familiarity with the spell they wanted to use.
Every path had their own methods.
Riya would not say that her path is the best, but it was the most suitable one for her.
"Huh? I don't understand." Amelia was confused.