defeating turtle

[easytarget]

Ok, so level 10, didn't have much trouble defeating the turtle.

But did run into something odd I've not experienced before, a cute little message about filing complaint with "Undead Control Administration Bosses" about not being allowed to use Rage of Spirits on bosses.

This is the first boss I've encountered, am I going to get told I can't use rage on every boss battle? Is this just a joke because the turtle is the first one and it's not all that hard?

What's the deal here people?