Ancient

Below is a list of all possible Ancient Monster Affixes

Ancient

Possessed

Weakens on Attack
Casts Corpse Explosion on Death
Slows on Attack

Extra Fast

125% increased Movement Speed
200% increased Attack Speed

Commander (Nightmare and Hell Only)

125% increased Movement Speed
200% increased Attack Speed
100% increased Life
125% increased Defense
50% increased Size

Extra Strong

150% increased Damage
25% reduced Movement Speed
25% reduced Attack Speed
25% increased Size

Cold Enchanted

Damage Type becomes Cold
Casts Ice Nova on Death
200% increased Attack Rating
20% increased Cold Resistance

Fire Enchanted

Damage Type becomes Fire
Casts Fire Explosion on Death
200% increased Attack Rating
20% increased Fire Resistance

Lightning Enchanted

Damage Type becomes Lightning
Casts Charged Bolts when Struck
200% increased Attack Rating
20% increased Lightning Resistance

Magic Resistant

55% reduced Magic Damage Taken

Mana Burn

75% Mana Burn on Attacks
200% increased Attack Rating
80% reduced Magic Damage Taken

Treasure Gobbler

75% Mana Burn on Attacks
500% increased Magic Find
125% increased Experience
30% increased Magic Damage Taken
145% increased Life
200% increased Attack Rating
100% increased Defense
25% reduced Movement Speed
30% increased Damage

Multishot

Fires 1 extra Projectile on Attacks on Normal difficulty
Fires 2 extra Projectiles on Attacks on Nightmare difficulty
Fires 3 extra Projectiles on Attacks on Hell Difficulty

Arcanas Curse

Damage Type becomes Magic
Casts Arcana on Death
60% reduced Magic Damage Taken
45% increased Damage

Venomous

Damage Type becomes Poison
Applies Poisoned on Attacks
Casts Poison Gas on Death
Immune to Damage over Time effects
50% increased Life
25% increased Damage

Punisher

Slows on Attack
Casts Punisher on Attack
65% increased Movement Speed
80% increased Damage

Fallen Angel (Hell Only)

Damage Type becomes Fire
Chance to drop Angelic Key on Death
Slows on Attacks
250% increased Life
200% increased Experience
75% increased Damage
25% reduced Movement Speed

Stone Skin

125% increased Defense
20% increased Life
75% reduced Damage Taken
75% increased Magic Find

Guardian of Hell

Spawns a Portal to the Arch Demons Plateau on Death
Chance to Drop Special Runes on Death
350% increased Defense
500% increased Life
175% increased Damage
65% reduced Damage Taken
20% reduced Movement Speed
275% increased Magic Find
35% increased Size