Head to the RF Group - Crossbell Branch in Crossbell’s Harbor area and speak with the Receptionist to view a scene, then speak to Tio after to head down into the Geofront AF Sector Junction. Follow the path around and take the lift down into the F Sector and you’ll gain the S-Craft Excel Breaker for Juna.

• Geofront F Sector 1

Follow the path ahead and take the first right you come across to enter a small room with a Chest that contains Effort, this give you a 70% chance to cook a superb dish when equipped. Continue down the main path and go right again to find a Chest that contains Curia Balm x5 and S-Tablet x5.

Take the left path and use the Operating Panel to activate the bridges, now head up the stairs and go right to find a Chest with Dark Hair - Kurt inside. Continue going West and keep to the left wall to find another small room with the final Chest of this area, inside will be a Marble Bracelet, this will prevent Mute when equipped. Keep along the main path and go into Geofront’s F Sector 2.

• Geofront F Sector 2

Follow the path along and then head down the stairs on the right to find a Chest that contains All Sepith x50, now go through the vent to the other side. Take the left path first to find a Chest that is holding a Brave Seed, then go the other way to find yourself on a thin path, here you’ll want to go left to find a Chest with U-Material x5 and the Operating Panel. Drop back down and go through the vent to the east, take the right path to find a Chest with Bagua Shoes inside, these useful Shoes will increase a multitude of stats and the EVA+ on them makes them ideal for Kurt.

Take the other path and use the Operating Panel to get across the bridge, now cross the bridge on the left and take the stairs up on the right to find a Chest with a Water Bell inside, this reduces delay to half when performing any Water Arts. Continue following the path and you’ll stumble across the final Chest with the Moebius Master Quartz. This Master Quartz is all about increasing the effectiveness of your items such as their potency and Item Range (at Level 3+). Head into the room ahead to face the boss of this dungeon, Magic Knight Heavy Ruby.

Boss: Magic Knight Heavy Ruby¶

Before you begin attacking this enemy you’ll want to use a Battle Scope on him first, then activate Juna’s Brave Order Sledgehammer which will increase your Break Damage by 300%, now use an S-Craft to quickly put him into the Break Status. Activate the Wind Blade Brave Order next to delay the Knight’s turn and then keep using normal attacks to build your BP back up. Before the Knight gets a turn you’ll want to use any S-Crafts available to finish off his remaining HP.

If he manages to break free he’ll begin to charge up an attack, here you’ll want to quickly Impede it, however, if you’re unable to do so you can activate Tio’s Brave Order Aeon Shield to deflect all incoming damage.

• Nightmare Strategy

You’ll almost definitely want Tio in your party for this battle, at the expense of Altina most likely. The tried and tested strategy of using Sledgehammer followed by Wind Blade once the enemy is broken is as useful as ever however should you find yourself in a situation where you have the BP to spare (or you’re on a Zero Order turn bonus), make full use of Tio’s incredibly useful Aeon Shield Brave Order, this will boost your CP by 80 and cast Reflect for four turns. As for Magic Knight Heavy Ruby, be wary of when it Enhances, you’ll want to make sure you have the CP to force it into Break as quickly as possible as it attacks quick and it’s attacks can and will most likely make a huge dent into your HP.

Upon defeating the Magic Knight you’ll complete the quest, obtain the Katze Master Quartz (has a chance to absorb magic attacks)