DEFENSIVE DRAGON BUFF

I was reading up on the Meddler Grab Bag stuff and noticed you guys had mentioned possibly introducing a "defensive dragon buff". In regards to "not wanting to make tankiness a problem" or "making people hard to respond to", what if you did a defensive buff that wasn't directly linked to champions? What if it was something related to the map? Or strategy?

TL;DR What if you made a "Reverse Mountain Drake" type of buff? Where towers were harder to take down for the enemy team?

You could do something like what has been done in Nexus Siege, where if a tower hasn't taken damage in 'x' amount of time, a small shield will be applied to it? Like a mini-Janna shield but longer-lasting? And each dragon of that type could increase the shield size?

Just a thought!