make a monster that roams the rift

make a monster that roams the rift putting pressure on whoever is in its path, then make killing it only worth gold and no exp also make it hard to kill, and also capable of taking out towers also make it to where it puts a tower in a state of fear so it doesnt attack the monster but make the monster only put pressure on a tower no longer then 15 - 20 seconds. also give it a blood sense passive that only works in the jungle so that it can smell out a jungler and chase em down. this would be a fun af troll game mode.