It's not terribly complicated, as it's mostly done via channeling aether to a familiar created for this endeavor. This does mean it can be quite draining and put a toll on the caster, but it's a simple process once the familiar is created.

[Which doesn't answer how easy it is to do but he's not sure how such concepts would translate to Ithaqua's world and magics... But in theory?]

It could be easily replicated, or it could be quite difficult. It's hard to say without attempting it.