
She can capture and control all living creatures with Force of Will, including champions (though they resist it better than most, probably).
Due to her non-capped scaling power, she can probably exercise more raw magic capability, though not necessarily finesse or art. (E.g, tearing up an entire mountain into the sky, versus a complex arcane ritual for dimensional teleportation.)
Most likely has a personal shield of some sort utilizing Force of Will, deflecting/turning aside attacks.

Most likely exercises a great deal more divine power, such as healing the masses or providing intervention to places she's not at personally.
As a side effect, her actual power scale is hard to determine, as both she and Morgana exist from a separate plane of reality and from a much higher tier of life.

In original lore, was considered a general of sorts for the undead - consequentially, most likely still retains the ability to command legions of undead, rather than just one particular target.
Probably has significant reanimation capabilities, both for himself and others, so death is not a permanent affair as far he's concerned.

Is actually quite massive (possibly mid-stack Cho'gath or more) in size, as seen in his splash arts/videos.
Due to his ability to deconstruct and understand said deconstructions perfectly, most likely has a way of intelligently recreating said deconstructions.