All liches NPCs have 50% chance to ignore crits, archliches and bloodliches have 100%

game/modules/tome/data/general/npcs/lich.lua

@@ -63,6 +63,7 @@ newEntity{
 	mana_regen = 0.3,
 	hate_regen = 2,
 	open_door = 1,
+	ignore_direct_crits = 50,
 	combat_spellpower = resolvers.mbonus(20, 10),
 	combat_spellcrit = resolvers.mbonus(5, 5),
 
@@ -149,6 +150,7 @@ newEntity{ base = "BASE_NPC_LICH",
 	combat_armor = 15, combat_def = 25,
 
 	self_resurrect = 1,
+	ignore_direct_crits = 100,
 
 	resolvers.talents{
 		[Talents.T_HYMN_OF_SHADOWS]=6,
@@ -185,6 +187,7 @@ newEntity{ base = "BASE_NPC_LICH",
 	on_melee_hit = {[DamageType.BLIGHT]=resolvers.mbonus(25, 30)},
 
 	vim_regen = 1,
+	ignore_direct_crits = 100,
 
 	resolvers.talents{
 		[Talents.T_FREEZE]={base=5, every=10, max=10},