Allows a thief to slice through the achilles tendon of a victem.

The strike could cause moderate damage (50hps), but result in the victem having extreme difficulty walking for a period of time (approx 1-2 ticks) When the victem attempts to walk, they will often fall to the ground in pain. Additionally, when they do succeed in taking a step, they will consume a very large number of mvs (approx 15/room).

Tendon damage can be healed only by cure critical (or a more powerful healing spell)

I was thinking something like this may be more suited for rangers and some kind of accuracy shot. May just be the name and the myth though that gives me the bias.