I'll just metagame a bit here, make of it what you will. Din's spear didn't get through the damage resistance.
As an aside, do you guys mind a bit of metagaming? Can you keep it separated from your actions? A lot of the people I've played with will use any and all information regardless of whether it makes sense in character, so I'm a bit leery of revealing stuff like that, but if you're good for it I'll do that a bit so that stuff makes a bit more sense.