>>40705279
You're simply charging up your mana because you're low on it.
And your body and mind are probably inefficient with mana regeneration in the first place, so I highly recommend getting lots of Sunlight to help with that fact, since then I've had more mana stored up within my body and mind quicker and more effectively now than ever before after I started getting a lot of Sunlight and taking specialized potions to help restore my mana (antidepressants)

Good luck and take care, anon!