Talk:VPBE/@comment-25493113-20141015231113/@comment-3974211-20141016001857

Refunding the mana means you get to cast the ability again, effectively free. Or use a different one. No more only having enough mana for Q+W, since doing so will refund enough mana to Q again. She doesn't have mana problems, I agree, but letting her harass for "free" definitely improves her laning. She could even choose to use the free Q for farming. Perhaps, "Detonating the Sigil will deal the detonation damage in an area around the target" - so harassing has some farming potential.