At this point, you should have found 5 missing robots already. This quest can be activated by bringing back 5 robots to the base.
Defending the Base
Story Quest: Defending the Base
Recommended Level: 36
To start this quest, simply talk to Prickle in the "Secret Base - Hall".

Preparation
Prickle will be force into the party, and he cannot be swapped during the battle, so let's do this line up: Prickle, Leo, and Ez.
- Equip your strongest equipment on your party.
- You may want to equip "Unfamiliar Stone" on Zinikr as well, since his level is way behind everyone else.
Note: If you have an extra slot for gemstone from unlocking Growth Map, feel free to put any quartz you like.
You'll be fighting 3 consecutive battles without a break:
This battle is very easy since they're all machine types. Prickle's "Lightning" and Leo's "Lightning Slash" will do a quick job.
One thing I recommend is to always kill the floating-yellow-rounded robot first, it has low health and will die in one shot, but they can cast "Time Bomb" which is annoying and deal a lot of damage.
You fought this boss before, this time it's a bit stronger but still very easy. It has Missile Pod and Laser Gun parts where you can destroy using magic. But, you don't need to do it, just go full offensive on the body.
Ez uses "Attack Up All" with Leo's combination of "Helm Bash" + "Concentrate" + "Samidare (Ltng+1)" deal so much damage to the boss.
Strategy:
- The most effective way is to go full offensive on one robot. Leo's "Concentrate" + "Samidare (Ltng+1)" and Prickle "Lightning" can quickly take one down.
- Ez focuses on healing and buff like "Quick All", "Attack Up All".
- When these guys start shooting missiles (apply elemental weakness at the same) and open their palms, you should focus on destroying the palms that you are weak against. For example, if you receive "Lightning" weakening debuff, you should destroy those palms with dark-blue colors. At this level you should be able to destroy at least 2 or 3 arms without issue.
- Prickle focus on providing backup like "Barrier All" and "Heal". Barrier helps protect their missile and prevent from getting "Mist".
- When one robot goes down, the other one is a piece of cake.
Side Quest: Treasure Mountain (Q-14)
Don't go anywhere yet, talk to the robot in front of the base for an optional side quest.

Your goal is to go to Junkyard and collect 10 Junks.
Path to Junkyard:

- Leave the Secret Base.
- (I-01) Wizard Belt: Machine Chest To you right, hidden behind the wall.
- Take the elevator (a), follow the path, take another elevator (b) down.
- Follow the path west, take the third elevator (c) up, walk a few steps, then take the elevator (d) to your left to go down.
- Continue to the Junkyard (A).

When you arrive at the Junkyard, you can start collecting Junks. There are 10 of them, West side has 5 and East side has 5. They sparkle and so bright that you can easily see them.
Rewards:
- (I-02) Poisonthrower
- (I-03) Sorcery Core
- (I-04) Battery x11
- (I-05) Regulator Chip x8
- (I-06) Magic Crystal x6
- (I-07) Chaos Stone x9
Missing Robot #6: Southern Forest - Entrance
Teleport to "Southern Forest -> Forest - Entrance", then turn left immediately. The robot is at the lake.

Reward:
- (I-08) Unfamiliar Stone
It also unlocked "Locked chests locator device", where you can get a hint of the next locked chest (you don't need to use it if you follow this guide)
There are 4 robot locations left, but we'll get them as we progress the story.