The material below is Open Game Content from a 3PP Source
School transmutation [earth]; Level sorcerer/wizard 4
Casting Time 1 standard action
Components V, S
Target creature or creatures touched (up to one per level)
Duration 1 round/level
Saving Throw Fortitude partial; Spell Resistance yes
Your touch progressively transmutes the substance of creatures you touch into stone. Once per round, you may deliver a touch attack that inflicts 1d4 points of Dexterity damage and slows the target (as the spell) for 1 round. A successful Fortitude save negates the slow effect but not the ability damage. A target reduced to 0 Dexterity is petrified permanently. Break enchantment, restoration, or stone to flesh can reverse the effects of calcific touch.