It is, but it doesn't sound particularly fun to use either. Not to me, at least.
A rune-type thing would be fine if it was some sort of proper CC spell (although it'd basically be a hunter trap), but an 8 second damaging ability that relies on the target to stay in it is an instant turn-off. It might be usable in guild raid groups, but if I'm going to get a new spell to use, I'd like to enjoy using it in more than just guild raids.