How to make a permanently damaged dispenser?

Werewolf

Probably not a real Werewolf
aa
Apr 12, 2011
873
309
Hi everyone.

I am working on an achievement map that has some dispensers that are either always damaged, or get damaged at a slow and steady rate.

I've been playing around with martijntje's [PREFAB] rocket spawner, but so far in testing it damages the player who is repairing the dispenser as well. So far I have been counter acting the effect by having a trigger_hurt entity covering the area that does -100 generic damage

Does anyone know a way I could damage any spawnable building in a way that it does not hurt the player? It need to allow the Circle the Wagons
(Repair 50,000 damage to friendly buildings constructed by other players.)
achievement.