If you're unsure what Rival Wings is, it's a PvP MOBA mode in-game that can be qued under the name Astragalos. It's a team vs team mech match in which you have to take down the other teams' two towers before you can kill their core and secure your team a win. Familiar bosses from the Alexander tier (Cruise Chaser, Oppressor, and Brute Justice) can be summoned to give your team the edge to win. Rival Wings was introduced patch 4.15. After its initial release, the mode has sense been dead and was thought to be one of the few pieces of content, like Diadem, that were unable to be experienced by players who were not there for the patch rush. I randomly happened upon a group of people from the reddit that put together weekly Rival Wings nights to get the que popping. I've participated in it for two weeks now: the first week Primal was able to get nine pops, and this last weekend we were able to get at least five. Aether was able to go for five and a half hours. If anyone is interested in experiencing this dead content, I encourage you to join the que on Saturdays at 9PM EST. By clicking here you can see the official page for Rival Wings.