Inverted Heart of Garmoth

Garmoth's Heart is so thick that you cannot perforate it even with using tools. However, the Sherekhans created a secret method to use a reflux of energy to melt the Heart and bring out its energy from inside. However, finding out about how to use this method is no easy task, because only a few people know it, and even if you can find someone who does, it will not be easy to convince them to reveal it.