hmm. So you want to know when 3+ mines have been laid in a trigger? Does it really matter who puts them there? Trigger condition of: {["mine_", str(_x)] call BIS_fnc_inString} count (thisTrigger nearObjects 10) > 2 That'll detect 3 or more placed mines within 10 meters of the trigger regardless of who placed them. No need for the eventHandler from above.