Before you even have the ability to gather Runes, you have to go through a tutorial of sorts; entering a battle and having a Rune drop from one of the enemy’s obstacles. Then it gets added to your Blacksmith and you can finally start using them.
I don’t remember much what was written in game at the time it was introduced, but the impression I’ve got was that Runes were supposed to become a new type of “in-battle” drop that would occur occassionally upon destroying enemy structures, whether it’d be Towers or Obstacles.
But ever since the “introductory” Rune drop, I have not seen a single one drop afterwards.
So… what’s the deal with Rune drops in Battles? Is this a thing or did I misread and misinterpret the whole thing?