What is this exactly? My 31 RR is leveling like a snail.
The second mission in the purple terminals. You need to clear the first group mission before unlocking it, which can be a chore so I recommend bringing one other person.
It's on a timer - if it's greyed out with a timer counting down, it's not up yet. Once the (20 minute?) timer is over, the button lights up with a 4 minute countdown. You join it then, and in theory you'll get dropped into a 15 man zergfest with some special rules.
1. There's 7 waves of increasing difficulty, evidenced by the 'threat meter' on the right hand side
2. You can lower the threat meter and make the enemies weaker by collecting power flares that show up on the map. It's very dangerous to do this alone, and you lose out on all the exp if you decide to be a hero. So I don't really go out of my way to get them and just pray the zerg gets the idea. Sometimes you get a Black Panther or Deadpool who is pro at grabbing them though.
3. To ensure you get enough exp, join a group inside and make sure you tag as many enemies as you can. With RR I use gravity mine and BFG.
4. At wave 7, a boss will spawn and you have 5 minutes to kill it. This can occasionally be impossible, Rhino is currently bugged and never dies. Electro with a self healing affix is impossible if you let the threat meter creep too high. This is just for some free loot though, the real prize is the EXP you gain on the way there.
Like I said it's pretty boring, but if you don't want to be level 31 forever you gotta do what you gotta do. I will say I don't mind the huge grind to the level cap, but I'm assuming the good drops come in the Helicarrier cosmic key missions and I'm hoping I can unlock some heroes there. Probably wishful thinking though.