Meet a few new or redone creatures.
The ghost of an ogre mage.
A phase spider, out of phase.
A rime skeleton from the frozen north, rime skeletons are internally lit by the sheer cold that exudes from them. I should add that rime skeletons are a redo of the Hellfire skeletons on the Vault already, subbing cold effects for fire effects, so while new, they aren't "new".