I was on my warrior, Spongebob, when I was ambushed by two nub warriors. I easily beat them, but both used Veneful blood, and I don't have it on my skill set. The thing is, when they used it and attacked me, I REGAINED MANA, I don't know about them, but I saw my mana jump from 20% back up to 100% while they were attacking me.

Has this happened to anyone else?