Mesmer: Illusion Of Life does 28K+ DMG
Illusion of Life is actually a revive skill – ‘Gives allies Illusion of Vengeance at the target location, allowing them to get up from downed and keep fighting. Fully revives allies if they kill a foe.’ It is simply not possible to kill somebody directly with this skill.
Have you been downed several times before?
http://wiki.guildwars2.com/wiki/Illusion_of_Life
And I thought there once was a skill that NPC used that had the same icon and name, but did huge damage.. but I can’t find anything to that memory…
Ahh, maybe that one answers your question: http://www.guildwars2guru.com/topic/58032-got-hit-for-20k-by-illusion-of-life/
And here: https://forum-en.gw2archive.eu/forum/professions/mesmer/How-does-Illusion-of-Life-work-exactly