The exodor island has many newly-made BAMs, why not slap some mechanics and eight extra animations on those and place them as dungeon bosses? Even some of the new humanoid enemies could be used for instance the "brawler" enemy or the "mecha-controlling lady" one.
In addition the last boss of "Balder's Temple" was never reused for any dungeon ever and this boss has 16 animations so there are many concepts that could easily be executed with this boss.

to make hair glowing and then
to make the glowing hair black?