Virus

[mouseno4]

I call it out on my SCH so that no one else uses theirs at the same time. That's really all there is to it.

Virus reduces a bosses damage-output stat by 15%. This can be huge to the survival of your group if used at the right time. Seeing as it doesn't stack, having someone waste theirs right after you applied yours, really sucks.

This would explain a lot. I have had the spell well before even reaching 50, yet ive never used it because i never noticed any discernible difference it made to the boss or his attacks.