Lifesteal

Lifesteal heals the player for a portion of damage dealt, it does not deal extra damage. This stat can be found on:

Astrology constellation Vale.
Elder Crown
Fervor I
Warlock Amulet
Some Wolf synergies

Sources

Source	Type	+X% Lifesteal	Other Modifiers
Elite Pillar of Conflict	Agility Pillar	+10% Lifesteal	+25% Chance To Preserve Prayer Points -3 Prayer Point Cost for Prayers (Prayer Point cost cannot go below 1) +350% GP From Monsters +50% Hitpoint Regeneration +35% Flat Slayer Area Effect Negation
Cooking Lesser Relic	Item (Consumable)	+10% Lifesteal	-5% Cooking Interval +30% Chance to gain +1 additional resource in Cooking (Cannot be doubled)
Elder Crown	Item (Helmet, Passive)	+10% Lifesteal	-0.1s Attack Interval +100% Bleed lifesteal
Vampiric Cloak	Item (Cape)	+10% Lifesteal	-25% Auto Eat Efficiency
Elusivity	Prayer	+10% Lifesteal	+50% Global Evasion
Blood Vial II	Item (Consumable)	+8% Lifesteal	+8% Auto Eat Efficiency
Vale	Constellation	+5% Lifesteal	-5% Cooking Interval +8% Chance to Double Items in Cooking +5% Chance to Preserve Food when eaten +5% Food Healing Value +8% Accuracy Rating +8% Cooking Mastery XP +8% Hitpoints Skill XP +8% Cooking Skill XP
Blood Vial	Item (Consumable)	+5% Lifesteal	+5% Auto Eat Efficiency
Superior Cape of Completion	Item (Cape)	+5% Lifesteal	Bypass All Slayer Area item requirements -30% Agility Obstacle Build Costs -20% Agility Pillar build costs -75% Prayer Point Cost for Prayers (Prayer Point cost cannot go below 1) -0.8s Thieving Interval -0.8s Crafting Interval -20% Woodcutting Interval -25% Cooking Interval -10% Summoning Interval -10% Astrology Interval -75% Coal Costs for Smithing -20% Township Building Cost (Does not affect GP cost. Capped at -80%) x2 Items received from Fishing x2 Items received from Fletching x2 Items received from Herblore Create +8 Additional Runes of the same type in Runecrafting +75% Ammo Preservation +2 to base drop quantity of Stardust and Golden Stardust from Astrology +1 Bolts produced per action in Fletching +2 Coal Ore per Ore Mined. (Item doubling does not apply) +50% Chance to gain +1 additional bar in Smithing (Cannot be doubled) +100% Chance to gain +1 additional resource in Fishing (Cannot be doubled) +100% Chance to gain +1 additional resource in Fletching (Cannot be doubled) +15% Chance to gain +1 additional resource in Crafting (Cannot be doubled) +100% Chance to gain +1 additional resource in Herblore (Cannot be doubled) +20% Chance to Double Farming Yield +100% chance to receive Ash per log burnt in Firemaking +100% chance to receive Charcoal per burn in Firemaking +4% Global Perfect Cook chance +100% chance to successfully Cook an item +20% chance to avoid the stun interval and stun damage in Thieving when pickpocket attempt fails +25% Chance to Double Items in Runecrafting +1% chance to find a Lost Chest while Fishing (This is separate to the Special Fishing Chance) +5% Chance to Preserve Food when eaten +5% Chance To Preserve Potion Charge +5% Chance To Preserve Prayer Points +8% Damage To Slayer Tasks +40% Farming Yield +100% chance to receive coal when burning logs in Firemaking +20% GP From Agility +150% GP From Thieving +5% Chance to find gem veins when Mining +8% Global Skill XP +15 Flat Hitpoints Regeneration +5% Magic Damage Bonus from Equipment +5% Melee Strength Bonus from Equipment +1 minimum Bird Nest's received from Woodcutting +5% of Maximum Hit added to Minimum Hit +5% Ranged Strength Bonus from Equipment +5% Reflect Damage +10% Rune Preservation Items that reduce Rune costs are now 4x as effective +25% Chance to Preserve Resources in Summoning +35% Flat Slayer Area Effect Negation +10% Slayer Coins +15% Chance to preserve Summoning Charges +10 Base Quantity for Summoning Tablet Creation +10% Summoning Maximum Hit +270 Stealth while Thieving
Superior Hitpoints Skillcape	Item (Cape)	+5% Lifesteal	+15 Flat Hitpoints Regeneration
Superior Max Skillcape	Item (Cape)	+5% Lifesteal	Bypass All Slayer Area item requirements -30% Agility Obstacle Build Costs -20% Agility Pillar build costs -75% Prayer Point Cost for Prayers (Prayer Point cost cannot go below 1) -0.8s Thieving Interval -0.8s Crafting Interval -20% Woodcutting Interval -25% Cooking Interval -10% Summoning Interval -10% Astrology Interval -75% Coal Costs for Smithing -20% Township Building Cost (Does not affect GP cost. Capped at -80%) x2 Items received from Fishing x2 Items received from Fletching x2 Items received from Herblore Create +8 Additional Runes of the same type in Runecrafting +75% Ammo Preservation +2 to base drop quantity of Stardust and Golden Stardust from Astrology +1 Bolts produced per action in Fletching +2 Coal Ore per Ore Mined. (Item doubling does not apply) +50% Chance to gain +1 additional bar in Smithing (Cannot be doubled) +100% Chance to gain +1 additional resource in Fishing (Cannot be doubled) +100% Chance to gain +1 additional resource in Fletching (Cannot be doubled) +15% Chance to gain +1 additional resource in Crafting (Cannot be doubled) +100% Chance to gain +1 additional resource in Herblore (Cannot be doubled) +20% Chance to Double Farming Yield +100% chance to receive Ash per log burnt in Firemaking +100% chance to receive Charcoal per burn in Firemaking +4% Global Perfect Cook chance +100% chance to successfully Cook an item +20% chance to avoid the stun interval and stun damage in Thieving when pickpocket attempt fails +25% Chance to Double Items in Runecrafting +1% chance to find a Lost Chest while Fishing (This is separate to the Special Fishing Chance) +5% Chance to Preserve Food when eaten +5% Chance To Preserve Potion Charge +5% Chance To Preserve Prayer Points +8% Damage To Slayer Tasks +40% Farming Yield +100% chance to receive coal when burning logs in Firemaking +20% GP From Agility +150% GP From Thieving +5% Chance to find gem veins when Mining +8% Global Skill XP +15 Flat Hitpoints Regeneration +5% Magic Damage Bonus from Equipment +5% Melee Strength Bonus from Equipment +1 minimum Bird Nest's received from Woodcutting +5% of Maximum Hit added to Minimum Hit +5% Ranged Strength Bonus from Equipment +5% Reflect Damage +10% Rune Preservation Items that reduce Rune costs are now 4x as effective +25% Chance to Preserve Resources in Summoning +35% Flat Slayer Area Effect Negation +10% Slayer Coins +15% Chance to preserve Summoning Charges +10 Base Quantity for Summoning Tablet Creation +10% Summoning Maximum Hit +270 Stealth while Thieving
Wolf	Item (Summon1, Summon2)	+2% Lifesteal
Bill & Wendy	Pet	+2% Lifesteal
Portable Rations II	Item (Consumable)	-8% Lifesteal	+20% Auto Eat Efficiency
Portable Rations	Item (Consumable)	-10% Lifesteal	+15% Auto Eat Efficiency