It can be identified by purple spectral runes swirling at high-speed around the champion. The buff is lost upon death and cannot be transferred from champion to champion, unlike the Crest of Insight and Crest of Cinders buffs.
How to obtain
By being alive while your team lands the killing blow on Vilemaw.
No longer grants bonus health regen, mana regen, cooldown reduction, or attack speed.
Duration increased to 3 minutes from 2 minutes.
Upon killing Vilemaw, champions become ghosted, ignoring all unit collision for the duration of the buff. Additionally, nearby minions gain aura bonuses, and briefly terrorize nearby enemy minions on first contact.