Damage types

Spoiler Warning: This page contains spoilers which may affect your IVAN experience negatively

IVAN has ten different types of damage:

Damage type	Common sources	Destroys limbs?	Resistance?	Notes
Physical damage	All weapons and normal attacks.	N	N	Reduced by armor.
Acid	Sulphuric Acid, dark frog blood	Y	Y
Drain	Neerc Se-ulb	N	N	Heals attacker by damage dealt to the defender.
Electricity	Wand of Lightning, Thunder hammers	Y	Y
Energy	Wand of Striking, Dark Mages	Y	Y
Fire	Explosions and fireballs, burning	Y	Y
Mustard gas damage	Dwarven Gas Grenades of Mustard Gas	N	N
Poison	poisoning	N	Y
Psi	Mind worms	N	N
Sound	Enner Beast, Banshee sickle	Y	Y

Notes

• While physical damage technically has no associated resistance, AV serves to decrease physical damage taken. However, AV also somewhat decreases damage of other types, thus making armor very important indeed.
• If a limb had its last HP taken by a damage type that destroys limbs, it will not drop as a severed limb. Instead, several lumps of the monster's flesh are dropped.
• Note that there is a slight distinction between damage taken from magical fireballs (from Wand of Fireballs or Dark Mage spells) and explosions (from mines) - fireballs deal pure fire damage, while explosions deal half fire, half physical damage. The result is that even monsters nearly immune to fire will take damage from an exploding landmine.