Question 1: When a PC levels up, do you roll the hit dice he just gained and add that to his total HP? Or do you just add, for example, 10 HP if he just gained another d10?
Question 2: How does NPC/creature HP work? For example, does every rat or wolf have the same HP or do you roll and add their hit dice before the battle? For example, why does Kiramor the Forest Shadow have 39 HP when his hit dice are 4d10+2d8+6 (and what's that +6 from?). I thought maybe it was half of what you could roll with the hit dice, but that's not it either... I'm ridiculously confused...