There will be split damage walls up all over the place. Bring four ADW units for safety. The dungeon has no hearts, but killing the Fire Elementals with the skull marks will activate Heal Panels for a few turns. There are many gigantic Elemental Laser Barriers that block all lasers except Water-element ones. Any units with a Laser bump combo must be Water units, or else their bumps will be useless. Units without Lasers may be any element.