Find the rules behind the item.

UNIQUE Regenerate 3% of maximum Life per secondLifeRegenerationRatePercentage T2 · LVL 1 → UNIQUE Regenerate 3% of maximum Life per secondLifeRegenerationRatePercentage T2 · LVL 1 → UNIQUE Regenerate 3% of maximum Life per secondLifeRegenerationRatePercentage T2 · LVL 1 → UNIQUE Regenerate 3% of maximum Life per second while on [LowLife|Low Life]LifeRegenerationOnLowLife T1 · LVL 1 → UNIQUE Regenerate 3% of maximum Life per second while on [LowLife|Low Life]LifeRegenerationOnLowLife T1 · LVL 1 → UNIQUE Regenerate 35 Mana per second if all [Equipped] Items are CorruptedBaseManaRegenerationWhileAllCorruptedItems LVL 1 → UNIQUE Regenerate 4% of maximum Life per secondLifeRegenerationRatePercentage T1 · LVL 20 → UNIQUE Regenerate 400 Life per second if no [Equipped] Items are CorruptedLifeRegenerationPerMinuteWhileNoCorruptedItems LVL 1 → UNIQUE Regenerate 5% of maximum Life per second if you have been Hit [Recently]LifeRegenerationIfHitRecently LVL 1 → UNIQUE Regenerate 5% of maximum Life per second while [Surrounded|Surrounded]LifeRegenerationWhileSurrounded T1 · LVL 1 → UNIQUE Regenerate 75 Life per second per Endurance ChargeLifeRegenPerMinutePerEnduranceCharge T1 · LVL 1 → UNIQUE Right ring slot: You cannot Regenerate ManaRightRingSlotNoManaRegen LVL 38 → UNIQUE Skill Mana Costs [StatConversion|Converted] to Life CostsLifeCost T1 · LVL 1 → UNIQUE Skills Cost [Divinity] instead of Mana or LifeSkillAndLifeCostsConvertedToDivinity LVL 1 → UNIQUE Skills from [Corrupted] Gems have 50% of Mana Costs [StatConversion|Converted] to Life CostsCorruptedSkillGemLifeCostConvertedToMana LVL 1 → UNIQUE Socketed Gems have no Reservation Your Blessing Skills are DisabledSocketedAurasReserveNoMana LVL 48 → UNIQUE Spectres have (50-100)% increased maximum LifeSpectreIncreasedLife LVL 1 → UNIQUE You and your Totems Regenerate 0.5% of maximum Life per second for each Summoned TotemLifeRegenerationRatePercentagePerTotem LVL 1 → UNIQUE You are considered on [LowMana|Low Mana] while at 50% of maximum Mana or below insteadHandWrapsLowManaThreshold LVL 1 → UNIQUE You have [MindOverMatter|Mind over Matter] while at maximum [Charges|Power Charges]MindOverMatterMaximumPowerCharge LVL 1 → UNIQUE You have no Life RegenerationNoLifeRegeneration LVL 1 → UNIQUE Your [Attack|Attacks] do not cost ManaAttacksCostNoMana LVL 1 → UNIQUE [Allies] in your [Presence] Regenerate (2-3)% of their Maximum Life per secondNearbyAlliesPercentLifeRegeneration LVL 69 → UNIQUE [Allies|Allies] in your [Presence|Presence] Regenerate (50-100) Life per secondAlliesInPresenceLifeRegeneration LVL 78 → UNIQUE [Attack|Attacks] cost an additional 6% of your maximum ManaAttackManaCost LVL 1 → UNIQUE [BloodMagic|Blood Magic]BloodMagic LVL 1 → UNIQUE [Companion|Companions] have (30-50)% increased maximum LifeCompanionLife LVL 1 → UNIQUE [EternalYouth|Eternal Youth]EternalYouth LVL 1 → UNIQUE [LifeLeech|Leech] (13-17)% of [Physical] [Attack] Damage as Life [LifeLeech|Leech] Life (25-20)% slowerLifeLeechAndRate LVL 1 → UNIQUE [LifeLeech|Leech] 10% of [Physical] [Attack] Damage as LifeLifeLeechPermyriad T1 · LVL 1 →