Damage Types

Acid

Corrosive substances, magical or alchemical

Bludgeoning

Blunt force attacks (Hammers, Falling, etc)

Cold

Extreme low temperature and cold magic

Fire

Natural flames, fire magic, and extreme heat

Force

Pure magical destructive energy

Lightning

Natural lightning / Electricity and electric magic

Necrotic

Unholy and corrupted magic

Piercing

Puncturing and impaling attacks

Poison

Venomous stings, spores, substances, and gases

Psychic

Mental attacks and psionic magic

Radiant

Holy and Divine magic

Slashing

Slicing or cutting attacks (swords, axes, claws, etc)

Thunder

Concussive bursts of sound or shock wave