I don't know how much terrain destruction we're going to get beyond 'You're battling on a rickety old rope bridge. Send the hobgoblins plummeting to their death?'
Just like monsters are dead at 0 hp unless melodrama dictates otherwise, I suspect terrain will be <relatively> invulnerable unless Kewl Over the TOP Akshun!!! dictates otherwise.
Just like monsters are dead at 0 hp unless melodrama dictates otherwise, I suspect terrain will be <relatively> invulnerable unless Kewl Over the TOP Akshun!!! dictates otherwise.