Non stacking abiltys = item

[Shendoo2]

The title might sound wierd but is there anyway to make it, so if a unit has 2 item that have a chance to bash the effect wont stack? like exampe 2 items that have 15% change to stun wont be 30% change to stun? it would just be 15%

 

[Avator]

Whenever a unit picks up an item, check if the item is already there. If it is, you negate the effect.

 

[Crusad3r91]

There's no way for negating an item's effect unless the effect is trigger-based and not ability-based.