Ok everyone, here is what I would like to do. I should warn you that I am an ultra noob at triggers, so be nice, ok? Anyway, I want to make an ability called deep vein drilling. Basically, the ability would, when activated, cause any gold mine owned by the player to discover a new "vein" upon emptying and refill to half (6250), but only once for each mine, and only for the player who both controls the mine and researched the ability. I know that I need to detect when a mine is depleted, if I researched the ability, which player I am, which mines I own, and run a trigger to recharge them, but I have no idea how.