Glass Cannon

Glass Cannon (sidequest) floods the entire map with Glass Tiles at the start of every battle, turning every fight into a glass-shard arena. Its active ability shoots a glass ball that deals 1 damage to a tile within range 4 and converts it to a Glass Tile. Complete the Glass Cannon sidequest to earn the upgraded version, which fires at infinite range without the map-flooding drawback.

The map-wide Glass Tile flood at battle start creates a consistent glass terrain for every fight, which can be an advantage if your cats synergize with Glass. However, it also means enemies benefit from the glass tiles, and any enemy that can exploit Glass terrain or shatter it for effects gains the same advantage you do. The active ability's range 4 limit is significant — you need to be relatively close to place tiles precisely, which can be dangerous.

During the Glass Cannon sidequest phase, lean into glass-synergy builds that can exploit the mandatory map flood. If your team has no glass interactions, the map flood is a neutral or negative condition and you should prioritize completing the sidequest quickly. The rare upgrade removes both limitations of the sidequest version, making the transition one of the cleanest sidequest-to-reward improvements available.