Would just like to point out (not sure if anyone else has) that the MegaDestroyer is bugged and will not die. It started early hours this morning, when he should have submerged the 2nd and final time, he just stood there with the “Determined” boon on him, returned to face him once again 8 or so hours later, and he is still bugged with no countdown timer.
2nd bug is with the Defeat Urrahn the Hunter skill point, his map marker and HP bar is there, but he isn’t.
Hopefully someone notices this and fixes it soon
Many other people would like to defeat him.