Frost Wall

The Bandits drew closer and they were gaining confidence. The first few volleys of Fireballs had been more than enough to drive them away, killing several in the process. They retreated to the underbrush, where they regrouped and planned. Now they advanced again, shields up, safe in their great numbers. The Witch surveyed her opponents, wand resting lightly in hand, waiting for the right moment.

It came soon enough, for the Bandits raised their weapons aloft, and came on with a cry. Their blood lust overcame their caution, and the Witch made her move. She flicked her wand quickly, and at once a great wall of solid ice sprang up in the Bandit's path. They crashed into it full force, and before they could recover, three other towering walls rose around them, locking them in an icy prison. Smiling, the Witch conjured a roaring pillar of fire in the center of the freezing prison, and delighted in the shrieks of her trapped enemies roasting alive.

Description on the official Path of Exile website

Skill Functions and Interactions

Duration: Higher skill gem levels will improve base wall duration, which can be further modified by "skill duration" passives and supports.

Permeability: Players, monsters and most projectiles can not pass through a frost wall. There are some exceptions: teleporting and leaping skills, and projectiles that pierce can pass through a Frost Wall. Frost Walls are Impermeable to all other movement and projectiles, even if they are originated by the caster.

On hit effects: Projectiles that trigger an effect everytime they hit something, like lightning arrow, trigger their effects everytime they hit an ice wall segment as well. Pierce can be used to trigger the effects multiple times.

Invincible: Frost Walls cannot be destroyed by any amount of damage.

Charges: When frost wall is struck by Power Siphon It has a chance to generate a Power Charge. For this to occur, Power Siphon must hit the frost wall a few moments before the wall's duration expires. If timed correctly Power Siphon counts as dealing the killing blow, and generates a power charge, despite the fact that Frost Wall is invincible.

Gem level progression

Level			Mana Cost	Base duration	Base Duration	Length	Cold Damage	Exp.	Total Exp.
1	4	16	9	3.00 sec	3.00	N/A	N/A	0	0
2	6	20	10	3.10 sec	3.10	N/A	N/A	841	841
3	9	27	11	3.20 sec	3.20	N/A	N/A	3099	3940
4	12	33	12	3.30 sec	3.30	N/A	N/A	7433	11373
5	16	41	13	3.40 sec	3.40	N/A	N/A	22895	34268
6	20	50	15	3.50 sec	3.50	N/A	N/A	49725	83993
7	24	58	16	3.60 sec	3.60	N/A	N/A	95714	179707
8	28	67	18	3.70 sec	3.70	N/A	N/A	169595	349302
9	32	75	19	3.80 sec	3.80	N/A	N/A	283759	633061
10	36	83	21	3.90 sec	3.90	N/A	N/A	453996	1087057
11	40	92	22	4.00 sec	4.00	N/A	N/A	703128	1790185
12	44	100	23	4.10 sec	4.10	N/A	N/A	1061223	2851408
13	48	109	25	4.20 sec	4.20	N/A	N/A	2065870	4917278
14	52	117	26	4.30 sec	4.30	N/A	N/A	2507110	7424388
15	55	123	27	4.40 sec	4.40	N/A	N/A	2573731	9998119
16	58	130	29	4.50 sec	4.50	N/A	N/A	7611351	17609470
17	61	136	30	4.60 sec	4.60	N/A	N/A	13437908	31047378
18	64	142	31	4.70 sec	4.70	N/A	N/A	25052147	56099525
19	67	148	32	4.80 sec	4.80	N/A	N/A	43869436	99968961
20	70	155	33	4.90 sec	4.90	N/A	N/A	242081178	342050139
21	72	159	34	5.00 sec	5.00	N/A	N/A	N/A	N/A
22	74	N/A	34	5.10 sec	5.10	N/A	N/A	N/A	N/A
23	76	N/A	35	5.20 sec	5.20	N/A	N/A	N/A	N/A
24	78	N/A	36	5.30 sec	5.30	N/A	N/A	N/A	N/A
25	80	N/A	36	5.40 sec	5.40	N/A	N/A	N/A	N/A
26	82	N/A	37	5.50 sec	5.50	N/A	N/A	N/A	N/A
27	84	N/A	38	5.60 sec	5.60	N/A	N/A	N/A	N/A
28	86	N/A	39	5.70 sec	5.70	N/A	N/A	N/A	N/A
29	88	N/A	39	5.80 sec	5.80	N/A	N/A	N/A	N/A
30	90	N/A	40	5.90 sec	5.90	N/A	N/A	N/A	N/A
31	91	N/A	40	5.95 sec	5.95	N/A	N/A	N/A	N/A
32	92	N/A	41	6.00 sec	6.00	N/A	N/A	N/A	N/A
33	93	N/A	41	6.05 sec	6.05	N/A	N/A	N/A	N/A
34	94	N/A	42	6.10 sec	6.10	N/A	N/A	N/A	N/A
35	95	N/A	42	6.15 sec	6.15	N/A	N/A	N/A	N/A
36	96	N/A	42	6.20 sec	6.20	N/A	N/A	N/A	N/A
37	97	N/A	43	6.25 sec	6.25	N/A	N/A	N/A	N/A
38	98	N/A	43	6.30 sec	6.30	N/A	N/A	N/A	N/A
39	99	N/A	43	6.35 sec	6.35	N/A	N/A	N/A	N/A
40	100	N/A	44	6.40 sec	6.40	N/A	N/A	N/A	N/A

Version history

Version	Changes
2.0.2e	Frost Wall's cooldown can no longer be bypassed by expending Power Charges. Frost Wall's cooldown has been reduced from 5 seconds to 3 seconds.
2.0.0	Now has a cooldown that can be bypassed by consuming Power charges. Its damage, duration, and wall length have all been greatly modified.
0.10.0g	Fixed a bug where Frost Wall could push around immobile objects.
0.9.12	Frost Wall can't be used through walls anymore.
0.9.4	Fixed a bug where Frost Wall could damage non-hostile bandit leaders.
0.9.2	Fixed a crash with Frost Wall.
0.8.7	Frost Wall added to the game.