Blood Magic

For the support gem, see Blood Magic Support.

Blood Magic (often referred to as BM) is a keystone passive skill that allows the character to spend life instead of mana to use skills. It also sets maximum mana to zero. If taken with Eldritch Battery energy shield will continue to protect mana but will not be spent.

Skills that reserve mana will reserve life. The cost of skills is calculated normally, so reduced mana cost or reduced mana reservation modifiers will reduce the amount of life used. It is not possible to commit suicide through Blood Magic.

Location

Blood Magic is located in the bottom left corner of the tree. Taking Blood Magic is required to reach the two 10% life nodes and the notable passive skill, Mortal Conviction.

Class	Distance from start
Marauder	12
Duelist	12
Templar	14
Scion	16
Ranger	19
Witch	21
Shadow	26

Item modifiers

These unique items have the Blood Magic modifier, which provides the same effect as this keystone. Taking the keystone in addition to equipping one of these items will impart no additional benefit.

Item
Skin of the LordsSkin of the Lords Simple RobeMovement Speed: -3%Item has no level requirement and Energy Shield (Hidden) Sockets cannot be modified +2 to Level of Socketed Gems 100% increased Global Defences You can only Socket Corrupted Gems in this item Item has 6 Sockets and is fully linked (Hidden) <Random Keystone>CorruptedThe Lords are chosen so carefully. Only they may grace His flesh.
Malachai's SimulaMalachai's Simula Iron MaskEvasion: (48-60) Energy Shield: (11-14)Requires Level 17, 21 Dex, 21 Int+20 to Strength +(20-30)% to Lightning Resistance Spells have a 20% chance to deal Double Damage Blood MagicIt was a sliver of Malachai's soul that animated the first Eternal Guardian.
Slavedriver's HandSlavedriver's Hand Ambush MittsEvasion: (243-318) Energy Shield: (51-66)Requires Level 45, 35 Dex, 35 Int+(30-40) to Dexterity (200-250)% increased Evasion and Energy Shield (30-20)% reduced Trap Throwing Speed Skills which throw Traps Cost Life instead of Mana Skills used by Traps have (10-20)% increased Area of Effect Increases and Reductions to Cast Speed also Apply to Trap Throwing Speed 10% chance to gain an Endurance, Frenzy or Power Charge when any of your Traps are Triggered by an EnemyA plan without a deadline stays a plan.
Replica Tukohama's FortressReplica Tukohama's Fortress Ebony Tower ShieldChance to Block: 25% Armour: (357-411) Movement Speed: -3%Requires Level 61, 159 Str+(20-30) to maximum Life+(80-100) to maximum Life You can Cast an additional Brand 20% increased Critical Strike Chance per Brand 40% increased Brand Damage Blood Magic"As one of our few creations that did not cost any fatalities, Prototype #10 bore unexpectedly positive results."
Tukohama's FortressTukohama's Fortress Ebony Tower ShieldChance to Block: 25% Armour: (357-411) Movement Speed: -3%Requires Level 61, 159 Str+(20-30) to maximum Life40% increased Totem Damage +(80-100) to maximum Life +1 to maximum number of Summoned Totems +300 Armour per Summoned Totem Blood MagicTukohama knew that he could not lose a fight in his fortress. So he carried his fortress to the fight.
Prism GuardianPrism Guardian Archon Kite ShieldChance to Block: 22% Armour: (156-179) Energy Shield: (32-37) Movement Speed: -3%Requires Level 68, 85 Str, 85 Int+12% to all Elemental Resistances+2 to Level of Socketed Aura Gems Socketed Gems Cost and Reserve Life instead of Mana Socketed Gems have 30% increased Reservation Efficiency +(20-30) to Dexterity +25% to all Elemental ResistancesWhen blood is paid, the weak think twice.
The Hungry LoopThe Hungry Loop Unset RingRequires Level 70Has 1 SocketConsumes Socketed Uncorrupted Support Gems when they reach Maximum Level Can Consume 4 Uncorrupted Support Gems Has not Consumed any Gems <Consumed support gem modifier>Be careful where you put your finger.

• The CovenantThe Covenant
  Spidersilk RobeEnergy Shield: (313-409)
  Movement Speed: -3%Requires Level 49, 134 IntSocketed Gems are Supported by Level 29 Added Chaos Damage
  +(20-30) to Intelligence
  (210-250)% increased Energy Shield
  10% increased maximum Life
  Skills gain a Base Life Cost equal to 100% of Base Mana CostMy Soul is your Strength
  My Price is your Blood (Pre-2.6.0 legacy variant)

Maps with the "...of Hemomancy" suffix treat all characters as if they have the Blood Magic keystone (suffix no longer appears).

Prism GuardianPrism Guardian
Archon Kite ShieldChance to Block: 22%
Armour: (156-179)
Energy Shield: (32-37)
Movement Speed: -3%Requires Level 68, 85 Str, 85 Int+12% to all Elemental Resistances+2 to Level of Socketed Aura Gems
Socketed Gems Cost and Reserve Life instead of Mana
Socketed Gems have 30% increased Reservation Efficiency
+(20-30) to Dexterity
+25% to all Elemental ResistancesWhen blood is paid, the weak think twice. and The CovenantThe Covenant
Spidersilk RobeEnergy Shield: (313-409)
Movement Speed: -3%Requires Level 49, 134 IntSocketed Gems are Supported by Level 29 Added Chaos Damage
+(20-30) to Intelligence
(210-250)% increased Energy Shield
10% increased maximum Life
Skills gain a Base Life Cost equal to 100% of Base Mana CostMy Soul is your Strength
My Price is your Blood grants Blood Magic to skill gems socketed in it, allowing the character to spend life instead of mana on those skills. However, unlike the Blood Magic keystone, it does not reduce maximum mana to zero. It also does not have a mana multiplier like .

Hezmana's BloodlustHezmana's Bloodlust
Vaal AxeTwo Handed Axe
Physical Damage: (222-256.5) to (378-447.75)
Critical Strike Chance: 5.00%
Attacks per Second: 1.15
Weapon Range: 1.3 metresRequires Level 64, 158 Str, 76 Dex25% chance to Maim on Hit(100-125)% increased Physical Damage
Adds (7-10) to (15-25) Physical Damage
1% of Physical Attack Damage Leeched as Life
40% increased Attack Speed if you've taken a Savage Hit Recently
Attacks Cost Life instead of ManaWhen a craving cannot be sated, any source will do. grants Blood Magic to all Attack skills used by the character.

Version history

Version	Changes
2.1.1	Fixed a bug where you could not get stunned while wearing the SkyforthSkyforth Sorcerer BootsEnergy Shield: (51-59)Requires Level 67, 123 Int+(60-120) to maximum Mana 30% increased Movement Speed 25% chance to gain a Power Charge on Critical Strike 12% increased Reservation Efficiency of Skills You have no Life Regeneration Stun Threshold is based on 500% of your Mana instead of LifeThe quick die young, the brilliant go mad, and the powerful stand alone in a wasteland of their own creation. boots with the Blood Magic Keystone allocated.
1.3.0	When Blood Magic is active, your mana orb no longer shows as fully reserved.
1.0.0	Players now cannot spend or reserve their last point of life with Blood Magic.
0.9.12p	Fixed a bug where skills would appear disabled if you have Blood Magic.
0.9.12m	Fixed a bug where players who cast their auras and then return to town to select the Blood Magic keystone passive will have free auras until they log out.
0.9.11	Totems with Blood Magic (from either a Support Gem or the player's passives) now do not spend their own life to cast spells.
0.9.10	Totems using percentage reserve skills with blood magic now correctly base the cost as a percentage of their life rather than yours.
0.9.9c	Blood Magic now no longer prevents traps from working.
0.9.7d	Fixed the interaction between Chaos Inoculation and Blood Magic so that there's no crazy bugged death state any more. If you try to reserve life or mana when you have both of these keystones, you will now die properly.
0.9.4	Introduced to the game.