Daemons are not of mortal flesh and have some immunity to mundane weapons. Daemons get a 5+ Ward save. However, this Ward save cannot be used against magical attacks (le. spells and magic items).
Any unit in base to base contact with the model has a -1 to hit penalty modifier.
Being corporeal manifestations of Chaos, Daemons' attacks are magical and can wound ethereal creatures. etc. This includes any special or ranged attacks they may have.
Poisoned Attacks. Hits of 6 auto wound. Sve as normal.
Chaos Spawn have a random number of Attacks. This is rolled at the start of every Close Combat phase. Roll to hit and wound as normal.