Ice Prison

Ice Prison (or known as prefix form ImprisoningImprisoning
Intrinsic
50% of Physical Damage Converted to Cold Damage (Hidden)
30% increased Cold Damage (Hidden)
Gain 25% of Physical Damage as Extra Cold Damage (Hidden)
+40% to Cold Resistance (Hidden)
20% additional Physical Damage Reduction (Hidden)) is an archnemesis monster modifier. The monster with this mod will occasionally cast a Frost WallFrost WallSpell, Duration, Cold
Level: (1-20)
Cost: (9-33) Mana
Cooldown Time: 3.00 sec
Can Store 3 Use(s)
Cast Time: 0.50 secRequires Level 4Creates a wall of ice which holds back enemies. Targets under the wall are damaged and pushed back.Deals (8-462) to (12-693) Cold Damage
Base duration is (3.00-4.90) seconds
0.15 seconds between appearance of Wall sections
Wall will be (2.8-5.6) meters long

Additional Effects From 1-20% Quality:
(2-40)% increased Cooldown Recovery RatePlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. Nova to trap the player's character. But unlike map boss that use similar circular wall skill, such as Winterfang and Burtok, Conjurer of Bones, the Frost Wall from the Ice Prison will have an opening instead of completely surrounding the player's character, similar to Sirus' Maze skill. However, the opening may still be blocked by terrain.

The mod also grants the monster the following (as of 3.19.1c patch):

50% of Physical Damage Converted to Cold Damage

Gain 25% of Physical Damage as Extra Cold Damage

30% increased Cold Damage

+40% to Cold Resistance

50% reduced effect of Cold Ailments

20% additional Physical Damage Reduction

Gallery

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  an encounter with Ice Prison modded monster in Azurite Mine

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  Monster with this mod will have a special visual aura effect

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  The icon of the Imprisoned debuff that previously inflicted by this monster mod

Version history

Version	Changes
3.19.1c	Increased the cooldown of the Ice Prison Archnemesis modifier from 5 seconds to 10 seconds, and the duration of the Ice Prison has been increased from 3 seconds to 5 seconds. This results in 50% prison uptime rather than 60%, and fewer overall prisons.
3.19.0f	Now has 20% additional Physical Damage Reduction (previously 25%).
3.19.0	The Corpse Detonator, Ice Prison, and Mirror Image Monster modifiers can no longer appear on Magic Monsters.
3.18.0d	No longer grants immunity to Cold Ailments. It now grants 50% reduced effect of Cold Ailments.
3.18.0	Archnemesis modifiers have been rebalanced and added to the core game. Existing Magic and Rare monster modifiers have been replaced with Archnemesis modifiers. [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.] No longer applies Imprisoned debuff that disable Travel skill. Now grants the monster a special visual aura [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]now 50% of Physical Damage Converted to Cold Damage (up from 25%) Gain 25% of Physical Damage as Extra Cold Damage (down from 50%) 30% increased Cold Damage (down from 50%) +40% to Cold Resistance (down from 60%) Immune to Cold Ailments (unchanged) 25% additional Physical Damage Reduction (unchanged) Periodically creates a barrier of Ice around the player for 3 seconds (5 second cooldown, 5 second global cooldown). (unchanged?)
3.17.0	Introduced to the game.