random Sentient Barn idea.
what if Barn was a composite of collateral damage? it's main piece(s) could be of a barn, just imagine if he was covered with bits and pieces of other dilapidated/abandoned/badly battered buildings. Barn's soul obtains a greater strength from the warmth and comfort provided by it's recently-razed ramparts.
this could translate in game, as Barn could gain strength depending on the state of the towers. he could become stronger if a tower's near death, or he could gain a temporary boost in a similar fashion to Jinx's passive.
that's as far as i've gone with the thought.