Side Story: A Certain Saintess 2

Armstrong asked his student to sit in front of him, and Luna did as she was told.

''Let's start with the lesson. Look closely and follow my instructions.'' 

"Channel Mana through your body to first active the Instant Strengthening,'' Armstrong instructed, and Luna immediately abides by his words. 

''Instant Strengthening!" 

Luna felt her body becoming filled with strength after the white light covered her body. She waited for her master's following instructions. 

''I know you feel your whole body overwhelming with strength but to use this better and not to waste your mana because you don't have unlimited mana. Focus more Mana in one point to save up Mana.'' 

Luna carefully listened to Armstrong's voice, not to miss anything.

Armstrong stood up and activated Instant Strengthening. 

''If I want to be faster, I just focus mana in my legs to momentarily increase their speed like this.'' 

Swoosh!