The new orb of lightning base

I see there is a new Orb or Lightning base that give % chance to use Item Purge...
So i thought about it, and tried to make it have % chance to use Item Poison but did not succeed.
If anyone have something similar done plz tell me how???

i think it works with unit targeting spells.

It only works with nactively used spells...

Use shadow strike or another damage over time skill

Yes! I got it to work with unholy frenzy, but the problem is the icon displayed is the disabled version, anyway i can fix this?

It's like i can properly cast unholy frenzy and everything else is working find, just the icon isn't right

bump..........

I think you mean the Unholy Aura Passive icon, you can change that in object editor>spells

no, i mean the disabled icon, converting lightning orb base into a hero ability, the reseach icon it uses based ability, but the normal icon it uses the effect ability's icon...which is where something gone wrong, it gives me a grayed out disable icon as in DISBTN

This is my method, create a new icon, import it as ReplaceableTextures\commandbuttonsdisabled\DisBTNICON.blp

now in the normal icon of the ability called by the orb of lightning ability use war3mapimported\bTnicon.blp

In game it would show the icon you just imported

now in the normal icon of the ability called by the orb of lightning ability use war3mapimported\bTnicon.blp

Really thanks for the icon help (just a little bit too late). I have had this problem with orb of lightning as a hero ability. I soluted it in this sucky way (it was ultimate so it was ok: I used a 0%-chance critical strike to add an item when the spell was learned. I dont think I will change it now though it was my oldest map (Masters of the Warriors) and it is not very good so I dont continue work on it! (play Ice Festival instead! ).