Blood Golem

Creates a golem that shares with you the life it steals.

Blood Golem is a level 18 Necromancer spell (Summoning tree, requires Clay Golem; it unlocks Iron Golem). It summons a single BloodGolem melee pet, needs no corpse, can be cast in town, and replaces any other golem. Its one trick is life steal: every successful hit returns a percentage of the damage as life, 86% at level 1 and 138% at level 20 towards a cap of 150%, and 30% of what it steals goes to you. In the other direction 25% of your potion healing goes to it. Its own growth is +20% life and +55% damage a level past the first. Mana is 25 at level 1 and 82 at level 20.

The numbers

• Life stolen is calc2 dm12, "Lifesteal %", the diminishing curve between Param1 75 ("Lifesteal % Min") and Param2 150 ("Lifesteal % Max"), which the Basin writes as min(75 + 75 × (110 × level ÷ (level + 6)) ÷ 100, 150): 86% at level 1, 126% at level 10, 138% at level 20, 143% at level 30. Above 100% the golem gains more life than it dealt.
• Share to the caster is calc3 Param3 30, "Lifesteal % transferred to caster", at every level. Caster healing to the golem is Param6 25. Damage received transferred to caster is Param5 0: the golem passes none of the damage it takes to you.
• Life is calc1, "HP % Modifier": (100 + Param7 20 × (level − 1)) × (100 + Golem Mastery's life %) ÷ 100 −

1. Alone that is +380% at level 20; with Golem Mastery 20 (+400%) it is (480 × 500 ÷ 100) − 100 = +2,300%. The base is the golem's own, 201 in Normal, 388 in Nightmare and 637 in Hell (the Basin).

• Damage is passivecalc3: Param4 55 ("Damage % per level") times the level minus one, plus 6% per hard point in Fire Golem: +1,045% at level 20. The Basin's older page has 35% a level; the table's 55 is the current game. The base is 6–16 in Normal, 9–23 in Nightmare and 10–27 in Hell.
• Attack rating is 60 plus Golem Mastery's ln56 (25 a level) plus 20 per hard point in Clay Golem (passivecalc2). Defense is 120 plus 35 per hard point in Iron Golem (passivecalc4).
• Mana is 25 at level 1 and lvlmana 3 a level: 82 at level 20, 112 at level 30. The Basin's older page has 21 + 4 a level; the table's 3 is the current game.

The steal, the life percentage and the damage percentage read the golem's full level (lvl); Golem Mastery is read at full level; the Clay, Iron and Fire Golem lines read hard points (blvl).

How it works

The golem is a golem pet with a melee attack that rolls Chance to Hit like a monster. The steal fires on its own melee damage (auraevent "domeleedamage"). The Basin's rules:

• One golem at a time; the level used for chance to hit, attack and defense is the caster's level at casting, and all stats are set at the point of casting. Golem Mastery and Summon Resist apply, and Battle Orders and Oak Sage are applied after the mastery's life.
• Life is stolen only from the golem's successful attacks. The target's drain effectiveness applies; the Basin says the difficulty's leech penalty does not, citing a Resurrected patch note. Damage returned by Iron Maiden, Thorns or Spirit of Barbs steals nothing. See Leech for drain effectiveness.
• Overflow goes both ways: if the golem's life plus the steal would exceed its maximum, the remainder goes to the caster; if the caster's life plus the share would exceed theirs, the remainder returns to the golem.
• Only healing from health and rejuvenation potions is shared with the golem; Prayer, Holy Bolt, life stolen per hit and Life Tap are not.
• It has 20% magic and 20% poison resistance, cannot be put into hit recovery or knocked back, and can open doors.
• In Resurrected the caster's Monster Physical Immunity is Sundered is applied to its hits (passivecalc5).

The share to you is 30% of a steal on hits that are not yours. Blood Golem heals itself far faster than it heals the Necromancer; the 25% of your potions it takes is the other half of the bargain.

Synergies and +skills

Three tooltip lines name the other golems, each read as hard points:

• Clay Golem: +20 Attack Rating per Level (Clay Golem Param8 20)
• Iron Golem: +35 Defense per Level (IronGolem Param8 35)
• Fire Golem: +6% Damage per Level (FireGolem Param8 6)

In return Blood Golem's own Param8 5, "Blood Golem HP % synergy", is +5% life per hard point to Clay Golem, Iron Golem and Fire Golem, inside their life multiplication. Golem Mastery is read at full level, so +skills raise what it lends; the cross-synergies move only with hard points. The Basin lists Bloodmoon and the Death runeword as sources of the skill through charges.

Against players

The Necromancer casts nothing on a player with this skill. The golem's hits on a player are physical melee hits cut to 17% by the player-versus-player rule, and the steal is read from the damage that lands; the Basin's page records no other player-versus-player rule. See Player versus Player.

Build notes

• Level 20 is +380% life, +1,045% damage and 138% life stolen for 82 mana; the steal at level 30 is 143%, so the late levels buy damage and life, not leech.
• Golem Mastery multiplies: 20 levels turn +380% life into +2,300%, and its +500 attack rating is the golem's main source of hits, which is what the steal depends on.
• Its own twenty hard points are also +100% life to every other golem; a Fire or Iron Golem build that never summons a Blood Golem still gains from points here.