Tyvek's Turtleback
(Abjuration, Invocation)

Range:  0
Components:  S, M
Duration:  1 day
Casting Time:  5 rounds
Area of Effect:  The caster
Saving Throw:  None

This spell was Tyvek's attempt at creating a defense against wayward theft of his life from the backstab of the common thief. Turtleback gives the caster a back of near stone hardness: when it is in place, a thief must make two attack rolls. If either fails then he did not hit the caster (and thus inflicts no damage), and he loses surprise. Note that it only affects the caster. Tyvek has moved on to higher level spells and never devised an improved turtleback to use on others (lucky for you thieves).
The material component for this spell is a tiny scrap or a turtle shell.

