Board Thread:Off-Topic/@comment-35639077-20180630112007/@comment-25404524-20180806082818

Actually, I tested and it is possible to leak a BAD and survive with just a Legend of the Night ability. Once any bloon leaks, no life is lost, then the Legend of the Night creates a black hole that eats up all bloons nearing the exit. Unfortunately, this wears out after 5 or so seconds and it can only be used once per game.

In fact, I could also show someone else doing it too. Link.