Harrowing Game Mode Idea

Every Harrowing (roughly Halloween) has been a fun time full of awesome haunting skins. I think its time it had an actual Game Mode like the Blood Moon event or Star Guardians. This Game Mode would take place on Summoners Rift (Could be a different one or new map). In this Game Mode Jungle Creeps would receive a Ghostly skin appearance, while lane minions would appear as Haunting Trees (Think Maokai) on one side and Haunting Rocks (Think Malphite) on the other side. In this game mode Jungle Creeps will occasionally wander the jungle to swap places with another camp. I.E. Wolves wander through river at random time to swap camp location with Red Buff, this includes Dragon and Baron occasionally swapping places with each other. The bushes have also gained a life of their own. A bush will grow near an existing bush location, like Ivern ability, when this happens another bush location will disappear. The bush location changes will be only within the jungle/river area. This game mode keeps the players wary of wandering from lane to lane as the jungle comes to life. There could be other changes if this isn't enough such as Jungle Creeps randomly attacking players on site (think toggle, they may not attack on site one spawn, they may attack on site on a different spawn), they may randomly join lane minions after 15 minutes into the game (except baron, dragon, and rift herald........this isn't doom bots).

What are your thoughts? Got a different Idea on Harrowing Game Mode, share it.