Damage Types

Resistance & Susceptibility Descriptors:
insignificantly     partially       quite               outstandingly
faintly             kind of         substantially       extraordinarily
hardly              somewhat        very                completely
barely              moderately      exceedingly
scarcely            reasonably      exceptionally
slightly            rather          extremely

The following damage types are relatively common in our realm:
air             chopping        fire            pure divine
biological      cold            mental          slicing
blasting        cursed          piercing        water
blunt           earth           poison          whipping
caustic         electric        pure arcane

These damage types may occasionally be encountered, but they are more rare:
leeching        pressure        stasis
mind control    sonic

These types are hardly (if ever) used.  At some point in the future some
of them may be repurposed for some new type of damage.
antimagic       natural         portal
falling         polymorph       radiant

Damage type field guide

Type	Spells	Weapons	Resistant Races	Vulnerable Races	Resistant Items	Vulnerable Items
air	Cyclone	Throwing Ax, "Tornado"	Fire Elemental (barely) Air Elemental (barely)	Water Elemental (barely) Earth Elemental (barely)		Torch Of Flames (faintly)
biological	Plague?? Virus??		Troglodyte (faintly) Golem (hardly)
blasting	Blast Bolt Detonate Torch	Blasting weapons
blunt	Dart	Blunt weapons
caustic	Acid Blast Acid Rain					Alienskin Arm Brace (insign)
chopping		Chopping weapons		Ent (faintly)
cold	Chill Touch Icestrike		Ent (faintly)	Firedrake (faintly) Lizardmen (faintly) Tuataur (faintly) Fire Elemental (barely)
cursed	Flash Torment (partial)		Demonseed (faintly) Demon (hardly) Hobgoblin (faintly)		Shield Of Heroes (faintly)	Helm Of Cherubims (faintly) Ring Of Purity (insign)
earth	Earthbind Earthquake Magma Blast (partial)		Deep Gnome (faintly) Duergar (faintly) Dwarf (faintly) Gargoyle (hardly) Gnome (faintly) Water Elemental (barely) Earth Elemental (barely)	Fire Elemental (barely) Air Elemental (barely)	Heart Of The Forest (insign) Mystical Desert Stone (insign)	Antharian Signet Ring (insign) Eye Of The Beholder (faintly) Pair Of Steel Bracers (faintly) Robe Of Greatness (faintly) Smoldering Crown Of Dying Fire (faintly) Torch Of Flames (faintly)
electric	Call Lightning Shocking Grasp Lightning Bolt Chain Lightning Torment (partial)		Gargoyle (faintly) Fire Elemental (barely)	Merfolk (hardly) Water Elemental (barely)
fire	Burning Hands Fireball Firestorm Flamestrike Magma Blast (partial) Pillar Of Flame		Firedrake (faintly) Demonseed (faintly) Demon (hardly) Fire Elemental (barely) Earth Elemental (barely)	Ent (faintly) Water Elemental (barely) Air Elemental (barely)	Dark Flaming Blade (insign) Impure Diamond Shield (insign)	Ice Ring (insign) Ice Scale Bracer (insign) Waterlace Leggings (faintly)
leeching	Energy Drain Death Field Leech Vampire Touch	Dark Flaming Blade
mental	Psychic Drain Psisting Mindlash Brainstorm Psionic Blast Ultrablast Rupture	Black Bow Called Awe	Duergar (faintly) Lizardmen (faintly) High Elf (faintly) Tuataur (hardly)		Single Silver Archer's Gauntlet (insign) Silver Astral Gauntlets (insign)
mind control
piercing		Piercing weapons
poison	poisons		Duergar (faintly) Dwarf (faintly) Ent (faintly) Golem (hardly) Griffon (faintly)		Durrite Greataxe (insign) Mithril Web Gloves (insign)	Alienskin Arm Brace (insign)
pressure			Water Elemental (barely)
pure arcane	Magic Missile Desiccate Disintegrate		Deep Gnome (faintly) Duergar (faintly) Dwarf (faintly) Gnome (faintly) Sprite (hardly)	Golem (hardly) Elemental (faintly)	Sceptre Of Growing Roots (insign)
pure divine	Cause Light Cause Serious Cause Critical Dispel Evil Turn Undead Turn Demon Harm	Holy Sword Of Kra	Duergar (faintly) Dwarf (faintly)	Demonseed (faintly) Demon (hardly)	Killing Gloves (insign) Sceptre Of Controlling Shadows (insign)	Carved Bone Necklace (insign) Dark Dwarven Brand (faintly) Shard Of Black Doom Marble (faintly) Symbol Of Darkness (faintly)
radiant			Lizardmen	all No-Sun races (faintly)	Emerald Sceptre Of Light (insign) Orb Of Amorphous Essence (insign)	Symbol Of Darkness (insign)
slicing		Sharp weapons
sonic
stasis	Struggling in Web??		Ent (faintly)	Goblin (faintly) Kobold (faintly)
water		Heavy Spear, "Ocean"	Merfolk (barely) Water Elemental (barely) Air Elemental (barely)	Fire Elemental (barely) Earth Elemental (barely)	Ouroborus' Tail (faintly) Waterlace Leggings (insign)	Carburized Steel Plate Armor (hardly) Chained Steel Collar (faintly) Flaming Pants (hardly) Slagwalkers (faintly)
whipping		Whipping weapons

Damage dealt

Some races will also deal damage of some of these types, based on what their resistances are. Right now these appear to be only evolutionary races: firedrakes, imps, and elemental giants. This will show up in 'score'.

For a low hero firedrake:
Attacks from your dominant hand are augmented with fire damage.
Attacks from your offhand are augmented with fire damage.

For a dust imp:
Attacks from your dominant hand are augmented with earth damage.
Attacks from your offhand are augmented with earth damage.