Forest Dweller

You bring back your hands and fire a blast of green energy at it, releasing a great amount of power in the process. The threads disintegrate, leaving only a pulsing heart-like object in the center. You fly forward to attack it, only to see the walls shoot strand after strand of black energy at the object as the ball is recreated. The threads wrap around it and as you fly at the heart, you are caught in the process, becoming one with the monstrosity. The battle is over before it has begun.