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''A pole in chains floats here. It seems inhabited by acid spirits. ''

*Cast [[courier ]] or [[Dark Messenger|dark messenger ]] on a [[Strange device]] while located inside of in a cave. *Must be 10 tiles away from another turret. *Range of fire is about ~8 tiles.*Able to Can be picked up by anybody unless planted*Loadable into loaded on a [[Large large cart]] and , [[Wagonwagon]], or picked up, unless planted.*Unable to recast.*Not improvable after casting.