Xenoblade Chronicles/Agniratha

This is the last of the Mechon area you get a chance to explore. There will be a cutscene involving Lady Meyneth in Fiora's body at the moment, explaining the history at the Central Tower. Vanea would leave your team to open up the last of this area.

Do your best to handle the remaining sidequests since you won't be coming back here again. Unless there are certain enemies you couldn't beat for the first time. Your objective is to go to four small towers to unlock the teleportation which is further on the opposite side of the Central Tower.

The person you have to beat once more before entering the teleportation is Gadolt. The second time, he'll have his Mechon minions distracting your team. So do your best to keep your team alive and ending Gadolt's attack on you through his giant Mechon armory.

When it's over, go to the teleport to face Egil for the second time since Galahad Fortress. Again like your earlier encounter with Gadolt, Mechon's will distract you so take care of them as well. Once it's over, you'll fight his Mechon suit before a cutscene kicks in. Your team escape with Reyn and Sharla having a final moment, followed by Miqol and his junk coming to the rescue.

Once your back at Fallen Arm, finish up remaining sidequests and stock up on better armour and weapons before your final battle with Egil. Also at this point, you can't access Mechonis Field anymore.