Lua/XML - Gold gained from kills trait

[Ultimaflame]

Hello! I'm quite new here, and I'm not entirely sure if I'm posting this in the correct section. But, I was wondering how I would go about implementing a trait where you gain gold for killing a unit, similar to how the Aztecs gain culture from killing a unit. I was trying to figure out a way to do this trough XML, but would I have to use Lua instead? I appreciate any suggestions. Thanks!

 

[xxhe]

You have to use .lua
It won't be very hard, though