Purple fog?

[SigFreud]

Hello,

Someone throw something at me so I am surrounded with some kind of purple fog. I can't see what it is (combat log doesn't show anything), I can't see any debuff anywhere and I can't remove it with my paladin, druid, mage or priest.

Here is a picture of it in case it helps: https://imgur.com/a/jbNbmZK

Anyone has an idea of what this is and how I can remove it?

Thanks in advance for your help.

Regards,

Sigi

[Shred]

You have to die to remove it.

[SigFreud]

You have to die to remove it.

Oh! That will happen sooner or later, then.

Thanks a lot.

Regards,

Sigi

[Baartleby2]

It's a quest item, called Draco-Incarcinatrix 900