Acquiring the Isle Map in Mina the Hollower is essential for keeping track of explored areas and repaired Spark Generators on the sprawling Tenebrous Isle. To obtain this valuable tool, players must first establish the Hollower's Guild in Ossex by completing a short side quest, which becomes available shortly after meeting Lionel.
Setting Up the Hollower's Guild
The quest to establish the Hollower's Guild begins in Ossex. Players can find the guild located directly beneath the Emporium. The entrance is accessible via a small alley just before the steps leading to the garden. After entering, players will need to burrow under the far wall to reach the next room and speak with Muriel. She will inform them that Thorne's men have raided the guild and that Rhene and Drillhardt are missing. It is recommended to ensure you have sufficient Plasma Vials before proceeding.
Securing a Kear
Before finding Rhene, players must acquire a Kear. Kears function as keys to unlock specific gates across the Tenebrous Isle. While players might already possess some, a Kear can be found within the Hollower's Guild. Alternatively, another Kear can be obtained by viewing an orange planet through a telescope located in the north-eastern part of Ossex. Accessing this telescope requires spending a Kear.
Locating the Rebel Barracks
To find Rhene, players must exit Ossex via its southern entrance, leading to the Southern Outskirts: Common. Players should retrace their path south until they reach the moving platforms previously used to access Ossex. Continuing south from there will lead to a set of stairs. At the top of these stairs, a Kear lock will be present. Using a Kear here and defeating the nearby enemies will allow access to a button that unlocks a second gate. This gate leads to the Rebel Barracks, and entering will cost one Plasma Vial.
Freeing Rhene
Upon entering the Rebel Barracks, players will encounter enemies in the first room. After dealing with them, a button on the left should be pressed. To check on Rhene and potentially acquire extra bones, players can enter the room to the left, press another button, and then talk to Rhene through the bars of her cell. To fully free her, players must proceed up the stairs in the previous room. Navigating through rotating balls and moving platforms, while avoiding hazards, will be necessary to reach Rhene's cell. After defeating the guards and crossing a gap, Rhene can be freed by using a Plasma Vial to heal her. As Rhene follows, players must guide her out of the barracks, noting that she cannot burrow and can only jump one block at a time. If Rhene is lost, players will need to backtrack and collect her. Throughout the escape, players will need to press four buttons to open gates, requiring careful navigation, burrowing under fences, and platforming. Once Rhene is freed, she will accompany the player back to the Hollower's Guild, providing support by occasionally sweeping up items, including useful Plasma Vials, and potentially bombs during combat.
Finding Drillhardt and Unlocking Upgrades
After returning to the Hollower's Guild with Rhene, the guild will be restored. Drillhardt, however, is still missing. He is found within the guild itself, disguised as vines in the bottom left-hand corner near a crate. Once freed, Drillhardt operates a shop selling various upgrades for the Underlab, while Rhene offers customization options such as Underlab skins. It is recommended to spend resources with Drillhardt first, as his upgrades are considered more useful. The Isle Map can be purchased from Drillhardt for 500 Bones. This map displays all visited areas and highlights fixed Spark Generators. An enhanced version of the map, providing a checklist of collectibles for areas with fixed Spark Generators, can be bought for an additional 500 Bones after fixing three Spark Generators.