Clarity

Clarity is a 'non-targeted' Summoner Spell. This spell instantly restores a portion of mana for yourself and half for all nearby allied champions.

Strategy
Clarity is best taken in teams where most, if not all, champions are mana based. Usually this spell is taken by a mana-hungry champion that needs to compensate with low base mana/mana regen (ie. ), or focuses on aggressive play by spamming their skills (ie. ).