Bone Offering

Bone OfferingMinion, Buff, AoE, Physical, Duration
Tier: 11
Level: (1-20)
Cost: (25-110) ManaImpale a Skeleton on a bone spike to shield your Minions while the spike remains, reducing the amount of damage taken from Hits. Taking a Hit that deals damage above a certain threshold will cause that Minion's shield to absorb all damage from that Hit, then explode.

The bone spike is itself a Minion, and shields itself. If it dies, shields on your other Minions disappear.Limit 1 Bone Offering Spike
Spike duration is 8 seconds
Minions take (15-25)% reduced damage from Hits while shielded
Absorbs first Hit dealing over 25% of Minion's maximum life

Additional Effects From 1-20% Quality:
Shielded Minions take (1.5-30)% less Damage for 1 second after Shield is lostSkills can be managed in the Skills Panel.

Acquisition
Drop restricted
It can be obtained by engraving an Uncut Skill Gem.Metadata
Item class: Skill Gem
Metadata ID: Metadata/Items/Gems/SkillGemBoneOffering

Bone Offering is an offering buff that increase defences of allied minions.

Skill functions and interactions

By using it you can sacrifice one of your skeleton to create shield that can absorb all damage from the next hit each minion takes, then explodes. It can be useful for mechanics that can one-shot your minions.

Gem level progression

Level			Mana Cost
1	0	0	25
2	3	9	28
3	6	14	32
4	10	21	35
5	14	28	39
6	18	35	43
7	22	41	47
8	26	48	51
9	31	57	55
10	36	65	59
11	41	74	64
12	46	82	68
13	52	92	73
14	58	103	78
15	64	113	83
16	66	116	88
17	72	126	93
18	78	137	99
19	84	147	104
20	90	157	110

Recommended support gems

The following support gems are recommendations by GGG as listed in-game, and do not necessarily reflect optimal combinations or the views of the wiki.

Gem tier	Support gems
I	Brutality IBrutality ISupport, Physical Category: Brutality Tier: 1 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that deals damage, boosting its Physical damage at the expense of all other Damage Types.Supported Skills deal 25% more Physical Damage Supported Skills deal no Chaos Damage Supported Skills deal no Elemental DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Efficiency IEfficiency ISupport Category: Efficiency Tier: 1Support Requirements: +5 StrSupports any skill, making it cost less to use. Cannot support skills which reserve Spirit.Supported Skills have 30% less CostPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Meat Shield IMeat Shield ISupport, Minion Category: Meat Shield Tier: 1Support Requirements: +5 StrSupports skills which create Minions, granting them less damage taken but making them deal less damage. Cannot support skills which create undamageable Minions.Minions from Supported Skills deal 35% less Damage Minions from Supported Skills take 35% less DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
II	Blind IBlind ISupport Category: Blind Tier: 2 Cost & Reservation Multiplier: 110%Support Requirements: +5 DexSupports any skill that Hits enemies, causing them to Blind on Hit.Supported Skills Blind Enemies on HitPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Brutality IIBrutality IISupport, Physical Category: Brutality Tier: 2 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that deals damage, boosting its Physical damage at the expense of all other Damage Types.Supported Skills deal 30% more Physical Damage Supported Skills deal no Chaos Damage Supported Skills deal no Elemental DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Pin IIPin IISupport, Physical Category: Pin Tier: 2Support Requirements: +5 DexSupports any skill that Hits enemies, allowing its Physical damage to Pin enemies but making it unable to Stun, as well as granting Critial Hit Chance against Immobilised enemies.Supported Skills have 50% increased Critical Hit Chance against Immobilised Enemies Modifiers to Stun Buildup for Supported Skills instead apply to Pin Buildup Supported Skills cannot cause Stun Buildup Physical Damage from Supported Skill is PinningPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
III	Meat Shield IIMeat Shield IISupport, Minion Category: Meat Shield Tier: 3Support Requirements: +5 StrSupports skills which create Minions, granting them less damage taken but making them deal less damage.Minions from Supported Skills deal 40% less Damage Minions from Supported Skills take 40% less DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Sacrificial OfferingSacrificial OfferingSupport Category: Sacrificial Offering Tier: 3Support Requirements: +5 IntSupports Offering Skills. Supported Skills Sacrifice a portion of your life on use, but deal much more damage and have more powerful Buffs in return.Supported Offering Skills have 30% increased Buff effect Supported Skills Sacrifice 15% of Life on use Supported Offering Skills deal 30% more DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
IV	Efficiency IIEfficiency IISupport Category: Efficiency Tier: 4Support Requirements: +5 StrSupports any skill, making it cost less to use. Cannot support skills which reserve Spirit.Supported Skills have 40% less CostPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
V	Brutality IIIBrutality IIISupport, Physical Category: Brutality Tier: 5 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that deals damage, boosting its Physical damage at the expense of all other Damage Types, as well as giving Hits from that skill a chance to ignore Physical Damage reduction.Supported Skills deal 30% more Physical Damage Supported Skills deal no Chaos Damage Supported Skills deal no Elemental Damage Hits with Supported Skills have 20% chance to ignore Enemy Physical Damage reductionPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	HeftHeftSupport, Physical Category: Heft Tier: 5 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports Skills which deal Damage, increasing the maximum Physical Damage of their Hits.Supported Skills deal 30% more Maximum Physical Hit DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Minion MasteryMinion MasterySupport, Minion Category: Mastery Tier: 5Support Requirements: +5 IntSupports Minion skills, granting them an additional level. Does not support skills which do not have levels.+1 to Level of Supported Minion SkillsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.

Item acquisition

Bone Offering has restrictions on where or how it can drop.

It can be obtained by engraving an Uncut Skill Gem.

Alternate skill effects

Bone Offering has the following alternate skill effects:

Item	Description

Version history

Version	Changes
0.3.0	Bone Offering: Spike duration is now 8 seconds (previously 5), while the Explosion radius is now 2.4 metres (previously 2). The explosion now deals 256-917 to 385-1375 Physical Damage at gem levels 11-20 (previously 205-734 to 308-1101). The Buff now has Minions take 20-25% reduced Damage from Hits while shielded, and also now has Absorbs first Hit dealing over 25% of Minion's Maximum Life. Quality now provides Shielded Minions take 0-30% less Damage for 1 second after Shield is lost, instead of 0-40% more Physical Damage on the Explosion. Removed "Barrageable" gem tag.[Undocumented]
0.2.1	Added "Barrageable" gem tag.[Undocumented]
0.1.0e	Bone Offering Explosions now have 15% Critical Strike Chance (from 13%).
0.1.0	Introduced to the game.