Your melee touch attack deals 1d6 points of nonlethal cold damage + 1 point per level, and the target is fatigued. The fatigued condition ends when the target recovers from the nonlethal damage. This spell cannot make a creature exhausted even if it is already fatigued. You can use this melee touch attack up to one time per level.
First of all, my Dm has choose to consider the Frostbite ( delivered through spellstrike ) like a riding magical effect.
From book ...
Spells, spell-like abilities, and energy attacks (even non-magical fire) ignore damage reduction.
So how Frostbite interact with ...
- monster with dr 10/-
- monster immune to frost damage
- Monster immune to non-lethal damage
Im not able to understand if having one "dr/immunity" is enought to block the damage, or if the damage is considered a "double type" and are needed both types of dr/reduction to prevent it ( For example a morningstar - B and P - can bypass a 10/piercing )
If a weapon causes two types of damage, the type it deals is not half one type and half another; all damage caused is of both types. Therefore, a creature would have to be immune to both types of damage to ignore any of the damage caused by such a weapon.
Bonus question :
Regardless of this, witht he above formula , if one use spellstrike with frostbite with a rapier(P) versus a monster with ( DR 5/slashing | 5 cold resistance ) both part of the damage get eventually reduced, right?