Aetherling vs oblivion ring

[Mr_Fahrenheit]

Ok. This is pretty tricky. It's my opponents turn. He had an {oblivion ring} on the field. The card it is exiling is my {oblivion ring}. He also has an {aetherling} and {venser, the sojourner} on the field. He uses venser's ability to bounce his oblivion ring. So when mine hits the battlefield again I want to exile his aetherling with it, and I am of the opinion that he cannot activate aetherling's ability to exile itself, as once the oblivion ring is on the field he does not get priority. He says that he is allowed to respond to my oblivion ring's etb trigger, even though I did not cast the spell. I think he might be right, but I'm not 100% sure. Help please?

[Sardok]

Your {Oblivion Ring} comes back into play.

Triggered ability goes on the stack targeting {Aetherling}.

Opponent activates {Aetherling}'s ability to exile itself. It resolves.

Triggered ability of {Oblivion Ring} now has no target, so the ability fizzles.

{Aetherling} comes back into play at the beginning of the end step, {Oblivon Ring} sits there uselessly.

[Kaleo42]

As a general rule if something would change in the game you can respond to it. It would be pretty unfair if you were not allowed to respond to someone removing a creature of their choosing.

[Mr_Fahrenheit]

Yeah I agree with that. I just got a little confused because my oblivion ring wasn't being cast, it was entering the battlefield via a different avenue. And I was just thinking that its unfair to get two bites of the cherry to respond to oblivion ring. Firstly you can counter it while its on the stack and then you can respond when someone names something you don't want them to name.

[Ekann1]

Yeah I agree with that. I just got a little confused because my oblivion ring wasn't being cast, it was entering the battlefield via a different avenue. And I was just thinking that its unfair to get two bites of the cherry to respond to oblivion ring. Firstly you can counter it while its on the stack and then you can respond when someone names something you don't want them to name.

guess thats what we get for having such a useful removal and versatile spell, although you're right, it is annoying to not know what they will name when they cast it.