Knuckle Cracker Wiki

Crystal Towers turn Creeper into hardened Crimson Creeper. All Creeper passing through their area is turned into Crimson Creeper that has a 5x increased resistance to Cannons and Mortars. Crimson Creeper's effectiveness against Anti-Creeper remains unchanged. Crystal Towers can be deactivated by clearing all Creeper from around them.

When there is no creeper underneath a crystal it slowly sinks down, turning white once it is flush with the ground. A crystal with pink top prevents building in the 3×3 area around the crystal, but you are able to build on a crystal with a white top. However, when creeper touches a white topped crystal (turning it pink) it destroys any unit touching the central tile of the crystal including normally indestructible units.

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