So we know that Darkin can corrupt humans, either really easily like Aatrox does or they take some time like Rhaast and Varus.
But what I would like to know is can a Darkin only corrupt humans? Here are some things I've thought of for questions
Could a Darkin corrupt a animal if the weapon they're trapped in got stuck in the animals flesh?
Could a Darkin corrupt a ascended since they use to be ascended?
Would a Darkin have a chance at corrupting a aspect or would the aspect purge them from their hosts body or something?
Would a Darkin be able to corrupt things already corrupted? Ursine who are under Volibears control, Voidborn or undead from the shadow isles?