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C.15: Beyond the Threshold, Part II
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Objectives:
* Place the mystic stones (2) in the Ancient Doorway statues of
  the Nuwali Gateway

Areas:
* Nuwali Gateway (X)

Items:
* Danger Room Disc Defend 204: when you enter the Gateway from the
  Corridors, go straight across the hall and break through the wall
  on the left for the disc
* Homing beacon: when you enter the Gateway from the Corridors, turn left
  and fight your way down the long hall with flame-throwing statues, near
  the end of the hall, break through the wall on your left and break your
  way through the walls to reach the beacon
* Data disc: from the homing beacon room, go straight across the large hall
  and through a series of rooms to a large cavern with bridges and islands,
  immediately turn left and send a flier along the ledge until you see
  the disc on the other side of the wall, break through the wall

Recommended Team:
* You'll need a flier or bridge builder to get the data disc

Return to the Nuwali Corridors and enter the Gateway. As you enter, go 
straight through the hall into the next door and break the wall to the left 
to pick up Danger Room Disc Defend 204.

Return to the entrance hall and go right. At the end is another hall with 
water troughs running through it. It's a long hall with lots of enemies 
and, just to make things interesting, flame-throwing statues along the 
sides. You can't destroy the statues or their flamethrowers, so just stay 
out of the way. Near the end of the hall is a breakable wall to the left.

When you break through the wall and get to the next room, walls rise out of 
the floor. They're breakable, so don't worry about them. Bust your way down 
the right side of the room to cross the bridge over the chasm and 
eventually get to a homing beacon--or 15,000 XP if you've already got four 
beacons.

Go back to the main hall and go straight through the door on the other 
side. Follow the rooms until you get to a cavernous room and find yourself 
on a bridge. You can, if you wish, thoroughly explore this room, building 
bridges to move from platform to platform. You'll find a way back to the 
Corridors exit; an exit to the Shrine and plenty of enemies to drop loot 
and give XP.

However, the important thing is right here. Look along the wall to your 
left as you come into the cavern. You can't walk along it, but send a flier 
down the wall until you see a breakable wall along the ledge (you should 
also be able to see the data disc behind the wall). Land, break down the 
wall, collect the disc and head back to the hall of flamethrowers.

Head through the main exit and you'll be in a large room with some columns 
that have glowing rings around them and an Xtraction point. If you fall off 
the raised floor where the Xtraction point is located, you can send a flier 
back up and the rest of the team will "jump" to you.

If, for some reason, you have no flier nor a teleporter, throw one of the 
switches to be sent to the homing beacon room you cleared a few moments ago 
and come back through the main door.

Alright, head across the room, place your mystic stones and open the 
Gateway. Professor X will call you back to Avalon to speak to Destiny; this 
would be a good time to get Iron Man's armor as well. The secret room is M-
shaped; and the boss at the end is guarding Iron Man's chest piece. The 
boss is invulnerable until you hit him with a popup combo (Attack, Attack, 
Smash).

Weird.

Get Iron Man's armor, return to Avalon, talk to Destiny, Xtract back to the 
Gateway and head on through to the Beyonders Sanctum.