Bonechill Support PoE

Bonechill Support is a support gem that grants the supported skill more cold damage and increased chill effect. Enemies take also increased cold damage from all sources based on the magnitude of the chill effect applied by the skill.

Supports any skill that can chill enemies or create chilling areas.

Cold, Support. Level: 1–20. Cost & Reservation Multiplier: 130%. Requires Level 38.

Supported Skills have (25–44)% increased Effect of Chill on Enemies
Enemies Chilled by Supported Skills increase Cold Damage taken by Chill Effect
Enemies in Chilling Areas from Supported Skills increase Cold Damage taken by Chill Effect
Supported Skills deal (5–14)% more Cold Damage

This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.

Name	Additional Effects From Quality	Weight
Bonechill Support	Supported Skills have (0–20)% increased Chill Duration on Enemies	50

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Related Gems

Name	Additional Effects From Quality	Weight
Bonechill Support	Supported Skills have (0–20)% increased Chill Duration on Enemies	50
Anomalous Bonechill Support	Supported Skills deal (0–10)% increased Cold Damage	100
Divergent Bonechill Support	Supported Skills have (0–10)% increased Effect of Chill on Enemies	100

Why do Combustion and Bonechill Support not work properly when a stronger Ignite/Chill are applied?

We've investigated this internally and have found that this behaviour was due to an optimisation that was introduced in 3.15. It can affect anything that adds an effect to things while your ailment is on them (e.g. Combustion, Bonechill, Taryn's Shiver, etc.). We've found that it only affects elemental ailments and that the order ailments are inflicted is not important but the remaining duration can be.

The optimisation we made is that elemental ailments are discarded if they can never become the active one affecting the enemy. An ailment is only discarded this way if there is at least one stronger ailment suppressing it which also has equal or longer duration (so the weaker one can never be "promoted" to active by outlasting the stronger one). Ailments usually having matching durations is why players are reaching conclusions about order mattering - the most recent ailment will usually have the most remaining duration, and thus not be discarded.

We plan to fix this behaviour so ailments with these kinds of extra effects tied to them are not discarded this way. The fix for this won't make it in time for release but we'll aim to get it out in a patch following it.

Level Effect

Level	Requires Level	Dexterity	Intelligence	Supported Skills have 25% increased Effect of Chill on Enemies	Supported Skills deal 5% more Cold Damage	Experience
1	38	27	40	25	5	388,734
2	40	29	41	26	5	477,437
3	42	30	43	27	6	583,786
4	44	31	45	28	6	710,359
5	46	33	47	29	7	1,355,511
6	48	34	49	30	7	1,138,877
7	50	35	51	31	8	1,368,233
8	52	37	53	32	8	1,638,338
9	54	38	55	33	9	1,956,648
10	56	39	57	34	9	3,655,184
11	58	40	58	35	10	3,017,327
12	60	42	60	36	10	3,576,232
13	62	43	62	37	11	4,231,667
14	64	44	64	38	11	2,395,078
15	65	45	65	39	12	8,421,063
16	66	46	66	40	12	16,159,983
17	67	46	67	41	13	41,170,367
18	68	47	68	42	13	86,794,448
19	69	48	69	43	14	157,405,063
20	70	48	70	44	14
21	72			45	15
22	74			46	15
23	76			47	16
24	78			48	16
25	80			49	17
26	82			50	17
27	84			51	18
28	86			52	18
29	88			53	19
30	90			54	19
31	91			55	19
32	92			56	20
33	93			57	20
34	94			58	20
35	95			59	20
36	96			60	21
37	97			61	21
38	98			62	21
39	99			63	21
40	100			64	22

Skill functions and interactions

The chill must be caused by a skill, regardless of whether the cold damage originates from a piece of gear, or the skill gem itself. If the enemy is affected by multiple sources of chill, (for example, Vortex both hits and creates a chilling area) only the strongest chill magnitude will be taken into account. Notably, sources of chill such as Aquamarine Flask will not provide a damage bonus, since a flask is not a skill (thus cannot be linked to support gems).

Chill, and therefore the effect of Bonechill, is capped at 30%. A chill that reduces Action Speed by 14% will cause the enemy to take 14% increased Cold Damage. Since freeze is considered a separate ailment, it will not impart any additional damage bonus.

Similarly to Combustion Support and Maim Support, Bonechill does not need to be linked to the player's main skill to apply its "increased damage taken" effects. This means that Bonechill can be applied by a secondary utility skill that activates on Cast when Damage Taken Support (such as Vortex or Cold Snap), while the player's main skill uses a more powerful gem such as Elemental Focus Support.

Item acquisition

Bonechill Support can drop anywhere. Drop level: 38.

Recipes

Bonechill Support can be created from the following recipes:

Amount	Part	Description
1	Bitterdream	level 1 Bonechill Support and 5 other gems
9	Gift of the Gemling Queen	Random level 20 support gem
7	Dialla's Subjugation	Random corrupted support gem with 23% quality
6	The Fox	Random level 20 gem
8	Dying Anguish	Random level 19 gem with 19% alternative quality
8	The Hook	Random corrupted level 21 gem with 23% alternative quality
3	Gemcutter's Promise	Random gem with 20% quality
1	Gemcutter's Incubator	Random gem with 1–20% quality
1	The Void	Random divination card set exchange

Quest reward

This item is given as a quest reward for the following quests:

Class →	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
Quest ↓	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
The Eternal Nightmare Act 4	✓	✓	✗	✗	✗	✗	✗

Vendor reward

This item can be bought at the listed NPC vendors, after completing the following quests:

Class →	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
Quest ↓	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
The Eternal Nightmare Act 4 Petarus and Vanja	✓	✓	✗	✗	✗	✓	✓
Fallen from Grace Act 6 Lilly Roth	✓

Related unique items

The following unique items are related to Bonechill Support:

Item	Base Item	Level	Stats
Bitterdream	Shadow Sceptre	32	22% increased Elemental DamageSocketed Gems are Supported by Level 15 Bonechill Socketed Gems are Supported by Level 15 Hypothermia Socketed Gems are Supported by Level 15 Ice Bite Socketed Gems are Supported by Level 15 Cold Penetration Socketed Gems are Supported by Level 15 Added Cold Damage Socketed Gems are Supported by Level 15 Inspiration
The Hungry Loop	Unset Ring	70	Has 1 SocketConsumes Socketed Uncorrupted Support Gems when they reach Maximum Level Can Consume 4 Uncorrupted Support Gems Has not Consumed any Gems