The sentinel, while not quite complete, has been overhauled. Interception was an awkward mechanic, requiring an attack roll to avoid another attack roll. Now it allows the sentinel's allies to use the sentinel's armor class instead of their own (well, at least the armor bonus component of that). Should hopefully be a little smoother and more elegant. The sentinel can now also challenge all foes within a certain radius to attack him and him alone. I should probably have an ability that penalizes opponent who do not attack the sentinel, and I may fit that in elsewhere.