108
You move back a few feet from the power wall then look up and focus all your attention upon the sphere. Silently you mouth the words of the Elder Magi battle-spell Splinter and, with a blink of your eyes, you project its energy at the centre of the glassy orb.
If your current ENDURANCE points score is 14 or less, turn to 23.
If your score is 15 or more, turn to 296.