Crest of Insight

Grants 10% cooldown reduction.

If you have mana, restores 5 flat mana and 1% of maximum mana per second, and if you have energy, instead restores 5 flat energy and 1% of maximum energy per second. If slain, this buff transfers to the killer.

The Crest of Insight is a neutral buff [leagueoflegends.fandom.com] granted by the Blue Sentinel [leagueoflegends.fandom.com]. It is available only on Summoner's Rift [leagueoflegends.fandom.com].

It can be identified by swirling blue runes around the champion. Because of this, it is often referred to as the blue buff or just blue .