Spell Requiring Nearby Patron

[Greatest]

I made a Structure unit called the Oil Pot in which could cast a Pour Oil ability (based on Flamestrike) to pour hot, scalding oil that damages anyone who is hit by it severely. I also made it so that this could backfire - if it dies, it would "tip over" and cast the same ability on itself and potentially kill anyone near its detonation radius. It also turns into a Neutral Passive structure upon construction so that anyone Player can use it regardless of who first built it.

I want to make it so that it could only be used if there's a nearby patron, similar to Goblin Laboratories when using the Reveal ability. A direct answer would be appreciated, but I would prefer if it was under a Spoiler Tab and instead you'd give me a push on the right track so I could develop my Trigger Editing skills more. Can anyone give me hints or advice to create this trigger?

 

[Cheshire]

give me a push on the right track

check the abilities and different fields that the buildings that require a patron have, try to find what you need to add to it so it will behave how you want.

 

[Greatest]

check the abilities and different fields that the buildings that require a patron have, try to find what you need to add to it so it will behave how you want.

It would seem that all buildings that require a patron have the Select Unit/Hero ability or the Shop Purchase Item ability. I don't want the Oil Pot to have a nearby patron to sell units nor items so it's still unclear to me how I could make the Pour Oil ability require a patron.

 

[Daffa]

Try to look how exactly Goblin Lab works in regards to it's reveal ability. I think the Select Unit would do the job.