to a beginner player this might seem like nothing
but this is actually one of the strongest spells in the entire game
every time you cast this spell, yes if its in the main cast frame it will add +.17s cast time BUT its giving you 30 mana back to the wand's mana pool
this is insane BECAUSE
imagine you are casting this spell at a 0 frame delay meaning 60 times per second
that is the equivalent of having a wand with 1800 mana recharge speed and ill show you why thats absurd in a second