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Unless stated otherwise, everything here is Diablo II: Resurrected build 3.3.93847, Reign of the Warlock.
Unless stated otherwise, everything here is Diablo II: Resurrected build 3.3.93847, Reign of the Warlock.

Erupt your demon's blood to damage nearby enemies.
How Blood Boil works, in depthThe Warlock's demon eruption. Physical and fire damage in a radius around your demon, 10–20 of each at level 1 and 194–258 of each at level 20, paid for with a share of the demon's life that falls from 15% to a 5% floor.| Ars Tor'BaalosUnique · Blasphemous Compendium | +2-4 to Blood Boil (Warlock Only) | 73 |
|---|---|---|
| Bloodpact ShardUnique · Mithril Point | +2-3 to Blood Boil (Warlock Only) | 67 |
| Level | Fire Damage | Damage | Demon's Life Cost | Radius | Mana cost |
|---|---|---|---|---|---|
| 1 | 10-20 | 10-20 | 15 | 5 | 3.75 |
| 2 | 18-30 | 18-30 | 14 | 5 | 4 |
| 3 | 26-40 | 26-40 | 13 | 5 | 4.25 |
| 4 | 34-50 | 34-50 | 12 | 5 | 4.5 |
| 5 | 42-60 | 42-60 | 11 | 6 | 4.75 |
| 6 | 50-70 | 50-70 | 10 | 6 | 5 |
| 7 | 58-80 | 58-80 | 9 | 6 | 5.25 |
| 8 | 66-90 | 66-90 | 8 | 6 | 5.5 |
| 9 | 76-102 | 76-102 | 7 | 6 | 5.75 |
| 10 | 86-114 | 86-114 | 6 | 7 | 6 |
| 11 | 96-126 | 96-126 | 5 | 7 | 6.25 |
| 12 | 106-138 | 106-138 | 5 | 7 | 6.5 |
| 13 | 116-150 | 116-150 | 5 | 7 | 6.75 |
| 14 | 126-162 | 126-162 | 5 | 7 | 7 |
| 15 | 136-174 | 136-174 | 5 | 7 | 7.25 |
| 16 | 146-186 | 146-186 | 5 | 7 | 7.5 |
| 17 | 158-204 | 158-204 | 5 | 7 | 7.75 |
| 18 | 170-222 | 170-222 | 5 | 7 | 8 |
| 19 | 182-240 | 182-240 | 5 | 7 | 8.25 |
| 20 | 194-258 | 194-258 | 5 | 7 | 8.5 |
| 21 | 206-276 | 206-276 | 5 | 7 | 8.75 |
| 22 | 218-294 | 218-294 | 5 | 7 | 9 |
| 23 | 234-320 | 234-320 | 5 | 7 | 9.25 |
| 24 | 250-346 | 250-346 | 5 | 7 | 9.5 |
| 25 | 266-372 | 266-372 | 5 | 7 | 9.75 |
| 26 | 282-398 | 282-398 | 5 | 7 | 10 |
| 27 | 298-424 | 298-424 | 5 | 7 | 10.25 |
| 28 | 314-450 | 314-450 | 5 | 7 | 10.5 |
| 29 | 334-480 | 334-480 | 5 | 7 | 10.75 |
| 30 | 354-510 | 354-510 | 5 | 7 | 11 |
Source: skills.txt row “Blood Boil” and skilldesc.txt of build 3.3.93847. Mana = (mana + lvlmana × (level − 1)) × 2^manashift ÷ 256; damage brackets at levels 2–8, 9–16, 17–22, 23–28, 29+ scaled by HitShift. · Report incorrect data