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User-made build

Created by Eleana.

Cassiopeia
Cassiopeia · Support

Cassiopeia

Build overview

Healer Cassiopeia

Summoner spells

FlashFlashTeleports you a short distance toward your cursor.HealHealRestores Health and grants Move Speed to you and target allied champion.

Skill order

ETwin FangETwin FangCassiopeia lets loose an attack that deals increased damage to Poisoned targets and heals her for a percentage of the damage dealt. If the target dies from this attack, Cassiopeia regains Mana.QNoxious BlastQNoxious BlastCassiopeia blasts an area with Poison after a brief delay, granting her increased Move Speed if she hits an enemy champion.WMiasmaWMiasmaCassiopeia releases several clouds of poison, slowing, grounding, and lightly damaging enemies that pass through them. Grounded enemies cannot use Movement abilities.

Augments

Escape PlanEscape PlanUpon dropping below 35% of your maximum health, gain a shield for 65% of your maximum health, 150% bonus movement speed, and reduced size (75 second cooldown). These effects all decay over 5.5 seconds.Ice ColdIce ColdYour slowing effects reduce the movement speed of targets by an additional 75.Leg DayLeg DayGain 50 bonus movement speed and 40% slow resist.ErosionErosionEach instance of damage dealt to an enemy reduces their armor and magic resistance by 1.5% for 4 seconds, stacking up to 20 times for a total of 30% resistances reduction.Ocean SoulOcean SoulGrants the Ocean Dragon Soul, which has a modified base heal value of 100, or a different Dragon Soul if you aleady have it.
Ethereal WeaponEthereal WeaponYour abilities apply on-hit effects (1 second cooldown per target).Bread And JamBread And JamYour champion's second basic ability (W) gains 100 ability haste.Shrink EngineShrink EngineScoring a champion takedown generates a stack, stacking infinitely. For each stack, gain 8 ability haste and 1% bonus movement speed, and reduce your size by 4%. Lose 65% of stacks on death. Size reduction is capped at 80% (20 stacks).SonataSonataAlternate between automatically casting a modified version of Sona's Aria of Perseverance and modified Song of Celerity, with the former being cast first (10 second cooldown). ARIA OF PERSEVERANCE: Heal yourself for 60 (+ 60% AP) and send out a tone to the most wounded allied champion within 1000 units that heals them for the same amount. Additionally, generate an aura that grants you and tagged allied champions a 80 (+ 40% AP) shield for 1.5 seconds. SONG OF CELERITY: Gain 30% bonus movement speed for 7 seconds. If you take damage during this time, the duration ends prematurely once or if 3 seconds have elapsed. Additionally, generate an aura that grants tagged allied champions 20% bonus movement speed for 3 seconds.Magic MissileMagic MissileDealing damage to an enemy champion with an ability fires 3 missiles at them that each deal true damage equal to 0.33% of the target's maximum health, increased to up to 1% based on distance travelled (maximum damage reached at 1000 units). This effect can only trigger once every 6 seconds from the same cast.Skilled SniperSkilled SniperHitting an enemy champion with a basic ability while located at least 600 units away from them at the time of the hit reduces its current cooldown by 80% of its total cooldown, modified to 65% for damage over time abilities.
Infernal ConduitInfernal ConduitYour ability hits against champions apply a Burn for 3 seconds that deals「 2 – 20 (based on level) (+ 4.6% bonus AD) (+ 2% AP) bonus magic damage per second 」(1 second cooldown per cast instance). This Burn stacks infinitely and refreshes with each application. Additionally, all of your Burn effects reduce the cooldowns of all your basic abilities by 0.08 seconds for each tick of damage they deal to a target.Ultimate AwakeningUltimate AwakeningCasting your ultimate ability resets the cooldowns of all your basic abilities and grants you 300 basic ability haste for 15 seconds (20 second cooldown). Additionally, gain 30 ultimate haste.CrueltyCrueltyImmobilizing or grounding an enemy champion summons a comet above them that lands at their current location after 1 second, dealing 50 – 150 (based on level) (+ 40% AP) (+ 4% of your maximum health) magic damage to enemies within a 300 radius (6 second cooldown per cast instance). For displacement effects, the comet will be summoned at the displacement's end location.

Start

Bandleglass MirrorBandleglass Mirror20 Ability Power100% Base Mana Regen10 Ability Haste900 goldTear of the GoddessTear of the Goddess240 Mana400 goldUnique – Manaflow: Grants a charge every 8 seconds, up to 4 charges. Affecting an enemy or ally with an ability consumes a charge to grant 3 bonus mana, increased to 6 if they are a champion, up to maximum of 360 bonus mana. Can only be triggered if an ability was cast and only once per cast instance. Unique – Helping Hand: Basic attacks deal 5 bonus physical damage on-hit against minions.League Wiki

Boots

Boots of SwiftnessBoots of Swiftness55 Move Speed1000 goldFleetfooted Reduce the effectiveness of Slows by 25%.

Core (no Ethereal Weapon)

Echoes of HeliaEchoes of Helia35 Ability Power200 Health20 Ability Haste125% Base Mana Regen2200 goldUnique – Soul Siphon: Gain 30% of pre-mitigation damage dealt to champions as Soul Charges, up to 80 – 250 (based on level). Healing or shielding an allied champion (excluding yourself) consumes all charges to heal them equal to the consumed amount.League WikiDiadem of SongsDiadem of Songs200 Health8% Heal and Shield Power1000 Mana100% Base Mana Regen2250 goldHarmony Gain % Heal and Shield Power. Consonance While you or any ally you've healed or shielded in the last 3 seconds is in combat with champions, each second, heal the lowest health nearby ally champion.Liandry's TormentLiandry's Torment60 Ability Power300 Health3000 goldUnique – Torment: Dealing ability damage burns enemies, causing them to take「 1% of the target's maximum health magic damage every 0.5 seconds over 3 seconds, capped at 20 per tick against monsters. 」「 6% of the target's maximum health total magic damage over 3 seconds, capped at 120 against monsters. 」 Unique – Suffering: For each second in combat with enemy champions, deal 2% increased damage, stacking up to 3 times for a total of 6%.League WikiDawncoreDawncore45 Ability Power16% Heal and Shield Power100% Base Mana Regen2500 goldUnique – First Light: Gain 2% heal and shield power and 10 ability power for every additional 100% base mana regeneration.League Wiki

Core (Ethereal Weapon)

Sword of Blossoming DawnSword of Blossoming Dawn45 Ability Power200 Health12% Heal and Shield Power15 Ability Haste2350 goldUnique – Effervescence: Gain 1.2% bonus attack speed per 1%  heal and shield power. Unique – Peppermint: Basic attacks on-hit cause the most wounded and nearest allied champion to be healed for 15 – 45 (based on level) (+ 10% bonus AD) (+ 7% AP).League WikiEchoes of HeliaEchoes of Helia35 Ability Power200 Health20 Ability Haste125% Base Mana Regen2200 goldUnique – Soul Siphon: Gain 30% of pre-mitigation damage dealt to champions as Soul Charges, up to 80 – 250 (based on level). Healing or shielding an allied champion (excluding yourself) consumes all charges to heal them equal to the consumed amount.League WikiLiandry's TormentLiandry's Torment60 Ability Power300 Health3000 goldUnique – Torment: Dealing ability damage burns enemies, causing them to take「 1% of the target's maximum health magic damage every 0.5 seconds over 3 seconds, capped at 20 per tick against monsters. 」「 6% of the target's maximum health total magic damage over 3 seconds, capped at 120 against monsters. 」 Unique – Suffering: For each second in combat with enemy champions, deal 2% increased damage, stacking up to 3 times for a total of 6%.League WikiDawncoreDawncore45 Ability Power16% Heal and Shield Power100% Base Mana Regen2500 goldUnique – First Light: Gain 2% heal and shield power and 10 ability power for every additional 100% base mana regeneration.League Wiki

Options

MorellonomiconMorellonomicon75 Ability Power350 Health15 Ability Haste2850 goldUnique – Grievous Wounds: Dealing magic damage to enemy champions inflicts them with Grievous Wounds for 3 seconds.League WikiRylai's Crystal ScepterRylai's Crystal Scepter65 Ability Power400 Health2600 goldUnique – Rimefrost: Dealing ability damage slows affected units by 30% for 1 second.League WikiBloodletter's CurseBloodletter's Curse65 Ability Power400 Health15 Ability Haste2900 goldUnique – Vile Decay: Dealing magic damage to an enemy champion with a champion ability applies a stack of Vile Decay to them for 6 seconds, stacking up to 4 times and up to once per basic attack or ability per cast instance every 0.3 seconds. Each stack inflicts 7.5% magic resistance reduction, up to 30% at 4 stacks.League WikiMikael's BlessingMikael's Blessing250 Health100% Base Mana Regen12% Heal and Shield Power15 Ability Haste2300 goldUnique – Purify: Remove all crowd control debuffs (except Airborne, Blind, Disarm, Nearsight, and Suppression) from yourself or the target allied champion and heal the target for 100 – 250 (based on target's level).League WikiStaff of Flowing WaterStaff of Flowing Water35 Ability Power10% Heal and Shield Power125% Base Mana Regen10 Ability Haste2250 goldUnique – Rapids: Healing or shielding allied champions (excluding yourself) grants you and them 40 ability power and 15 ability haste for 6 seconds.League WikiArdent CenserArdent Censer45 Ability Power10% Heal and Shield Power125% Base Mana Regen4% Move Speed2200 goldUnique – Sanctify: Healing or shielding allied champions (excluding yourself) enhances you and them for 6 seconds, granting 25% bonus attack speed and 20 bonus magic damage on-hit on basic attacks.League Wiki

Creator notes

As Cassiopeia is a shorter ranged mage, this build is only really effective if there are champions you can cast spells on. Build Rylai'sRylai's Crystal Scepter65 Ability Power400 Health2600 goldUnique – Rimefrost: Dealing ability damage slows affected units by 30% for 1 second. to help your allies kite juggernauts and bruisers/help you stick on a target you are Eing. After completing your core build, you can go Grievous Wounds/Bloodletter'sBloodletter's Curse65 Ability Power400 Health15 Ability Haste2900 goldUnique – Vile Decay: Dealing magic damage to an enemy champion with a champion ability applies a stack of Vile Decay to them for 6 seconds, stacking up to 4 times and up to once per basic attack or ability per cast instance every 0.3 seconds. Each stack inflicts 7.5% magic resistance reduction, up to 30% at 4 stacks./Mikael'sMikael's Crucible40 Magic Resist7 Health Regen per 5 seconds18 Mana Regen per 5 seconds2500 goldMana Font: Increases Mana Regen by 1% for every 1% of missing Mana.Active 180s Removes all Stuns, Slows, Taunts, Fears, Silences, Blinds, and Immobilizes on an allied champion and Heals that champion for 150 (+10 of maximum Health)./Rylai'sRylai's Crystal Scepter65 Ability Power400 Health2600 goldUnique – Rimefrost: Dealing ability damage slows affected units by 30% for 1 second. when necessary. Otherwise, just build Staff of Flowing WaterStaff of Flowing Water35 Ability Power10% Heal and Shield Power125% Base Mana Regen10 Ability Haste2250 goldUnique – Rapids: Healing or shielding allied champions (excluding yourself) grants you and them 40 ability power and 15 ability haste for 6 seconds. > Ardent. Ethereal WeaponEthereal WeaponGoldYour abilities apply on-hit effects (1 second cooldown per target). goes well with other augments such as Shrink RayShrink RayGoldBasic attacks on-hit reduce the target's damage dealt by 15% for 3 seconds, refreshing with each hit. Their size is also reduced significantly for the duration. and Mystic PunchMystic PunchPrismaticBasic attacks on-hit reduce the remaining cooldowns of your abilities by 1.25 seconds.. Prioritize anvils/augments that offer Heal & Shield Power > Movespeed > Survivability > AP > Haste. I think some form of bootsBoots25 Move Speed300 gold are probably always required for this Cassiopeia build, either Swifties, MercsMercury's Treads20 Magic Resist45 Move Speed30% Tenacity1250 gold, or Tabis depending on the game. This exact build, or very similar, works on any poke mage (and they can more commonly skip bootsBoots25 Move Speed300 gold entirely). I've had success building it on Zyra, Taliyah, Ziggs, Vel'Koz, and Hwei. It could possibly also work with Aurelion Sol, Malzahar, Xerath, and Brand.

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