Nisan Mausoleum and the First Gate: Hermit's Hole

Items found at the Mausoleum: Deathblower 1, Desert Worm

Enter Nisan and after a short scene, you'll fight some guards. Stand still and more guards will come after you (You have to beat all of them). After they're defeated, you'll watch another scene (You can't use Citan for now), then you should go to the Store (even if it's empty) and touch the table to buy anything you want. After that, exit Nisan through the West (or East) exit, then circle around the lake on the city map and talk to Margie. Go down many sets of stairs until you find a locked door. It doesn't matter what you choose, just check the panel to the East if you decide Bart should remember it, then enter the next room. After defeating more guards, you'll watch a scene, then head North and enter the elevator. Follow the spiral hallway, open the North door, then use the Fatima Jasper to continue. Take the West path, cross the North door, then save the game and get the Desert Worm at the bridge. Take another North door, head East, then take the elevator up. Head NorthWest, enter the Energy Block, then take the third door to the South to find a Deathblower 1. Go back to the corridor entering the second door to the South, cross the NorthWest door, check your retinas, then save. Enter the SouthEast door, circle South, then follow the SouthWest path (There are lights at its sides) to find the Omnigear. Continue SouthWest and read the inscription (The lights will automatically turn on). Now go back to the bridge room (The tool you will be selling items) and check the panels to watch a scene. Now go back to the Gear room (You'll find enemies from now on), watch a scene near the second Jasper lock, then you'll have to fight 2 Neo Etones when you reach the gear.

I only considered these Neo Etones as bosses because of the boss theme playing while you fight them. Just crush them with your newly acquired Andvari and the others. After some conversation you'll be back at Nisan (You can change characters by talking to them). When you're ready, head West to the Hermit's Hole (Now known as Ignas' Gate Cave) and fight 2 Neo Etones. Equip the Seal Ar or Barrier you got from them and continue North to fight Shakhan.

This is a tough battle, but it's only a matter of patience. Equip WaterVeil Ars and Seal Ars to protect yourself against Ignas Storm and Seal Punch. Do not attack him while he's attached to the gate or else Shakhan'll heal 1000 HP. He will also counter attack every time you attack him when he's disattached, so use Frame HPs when necessary. After defeating Shakhan, exit South and you'll watch some scenes until you're back to Bledavik planning to destroy the Second Gate.