Recently, Path of Exile official website released a build guide that called “Friends with Benefits”.
That build wrapping up Season Eight of Build of the Week by featuring a Deadeye build that takes many of the mechanics GGG have covered in earlier episodes of this season and combines them to generate up to fifty clones of yourself which absolutely melt bosses.
Check out the official build guide video, also check if you have enough poe exalted orb:
Oblivion Ring’s trigger requires you target a nonland permanent other than itself if it exists, exiling that permanent until it leaves the battlefied.
The only non-land permanent was another Oblivion Ring, which had targeted a third Oblivion Ring. Assuming no player interaction (like bouncing or destroying one of the o-rings) it creates an infinite loop, which breaks MTGO.
When the new o-ring removes the second o-ring, it bring the third one back into play, and it must target one that just hit the battlefield.
You can see some of this interaction at the beginning when he sacrifices his spellbomb to force an o-ring trigger to target the o-ring that exiled his Elesh Norn.
For reference, if you did this in paper MtG, the game would be a draw unless someone had a permanent they could flash in or a way to destroy/bounce one of the rings.