Stops the opponent from completely turning the game around.
Stops aggro overloading the board.
This spawning on the opponent's turn will cause major problems for them. Yes, the opponent can kill it asap it comes out, but they will have to go out of their way to do it. It's a bloody 6/6 beast! One of the highest stated beast in the game, only for hunters.
2 mana 6/6, "cause disruptions to your opponents gameplan, if they continue their gameplan, still cause disruptions."