User blog comment:YourPrivateNightmare/Ayona, the Mothbound/@comment-7481207-20141109205430/@comment-5077844-20141109213841

I guess it would work like a regular spellshield. the AoE remains where it is, but NAsus gets the initial damage...maybe even the DoT as long as the shielded target remains there (the spell knows that it'S the same spell and therefore nullifys all continuing effects on the target and applies the to Nasus)

I don#t know if something like that is actually compatible with the games' code...but when in doubt, it can always just work like a regular spellshield does