Runic Capacitor

Runic Capacitor

ShopDefect
Start each combat with 3 additional Orb Slots.

On the first turn of each combat, right after the turn starts, you get 3 extra Orb Slots for the fight, on top of the Defect's base slots. More slots means more Orbs sit and run their passives each turn before anything is Evoked. It fires on turn 1 only, so slots lost later, for example to Bulk Up, are not refilled. Defect only, Shop, 200 Gold.

Rarity
Shop
Character
Defect
Shop price
200 gold

When to take Runic Capacitor

Buy it for decks that Channel more than they Evoke, like Frost walls, Lightning batteries or Dark stacks. Skip it if you rely on Dualcast style Evoke damage from one or two slots.

Cards that synergize with Runic Capacitor

Barrage
Attack
1
Deal 5 damage for each Channeled Orb.
Barrage deals 5 per Channeled Orb.Deal 5 damage for each Channeled Orb.
Coolant
Power
1
At the start of your turn, gain 2 Block for each unique Orb you have.
Coolant gives 2 Block per unique Orb each turn.At the start of your turn, gain 2 Block for each unique Orb you have.
Tempest
Skill
X
Channel X Lightning.
Tempest and Voltaic fill the slots at once.Channel X Lightning.
Voltaic
Skill
3
Channel Lightning equal to the Lightning already Channeled this combat.
Exhaust.
Tempest and Voltaic fill the slots at once.Channel Lightning equal to the Lightning already Channeled this combat.
Exhaust.
Defragment
Power
1
Gain 1 Focus.
Defragment scales every passive.Gain 1 Focus.
Ice Lance
Attack
3
Deal 19 damage.
Channel 3 Frost.
Ice Lance Channels Orbs for Runic Capacitor to work withDeal 19 damage.
Channel 3 Frost.
Meteor Strike
Attack
5
Deal 24 damage.
Channel 3 Plasma.
Meteor Strike Channels Orbs for Runic Capacitor to work withDeal 24 damage.
Channel 3 Plasma.
Consuming Shadow
Power
2
Channel 2 Dark.
At the end of your turn, Evoke your leftmost Orb.
Consuming Shadow Channels Orbs for Runic Capacitor to work withChannel 2 Dark.
At the end of your turn, Evoke your leftmost Orb.
Glacier
Skill
2
Gain 6 Block.
Channel 2 Frost.
Glacier Channels Orbs for Runic Capacitor to work withGain 6 Block.
Channel 2 Frost.
Lightning Rod
Skill
1
Gain 4 Block.
At the start of the next 2 turns, Channel 1 Lightning.
Lightning Rod Channels Orbs for Runic Capacitor to work withGain 4 Block.
At the start of the next 2 turns, Channel 1 Lightning.
Refract
Attack
3
Deal 9 damage twice.
Channel 2 Glass.
Refract Channels Orbs for Runic Capacitor to work withDeal 9 damage twice.
Channel 2 Glass.
Ball Lightning
Attack
1
Deal 7 damage.
Channel 1 Lightning.
Ball Lightning Channels Orbs for Runic Capacitor to work withDeal 7 damage.
Channel 1 Lightning.
Chaos
Skill
1
Channel 1 random Orb.
Chaos Channels Orbs for Runic Capacitor to work withChannel 1 random Orb.
Chill
Skill
0
Channel 1 Frost for each enemy.
Exhaust.
Chill Channels Orbs for Runic Capacitor to work withChannel 1 Frost for each enemy.
Exhaust.
Cold Snap
Attack
1
Deal 6 damage.
Channel 1 Frost.
Cold Snap Channels Orbs for Runic Capacitor to work withDeal 6 damage.
Channel 1 Frost.
Coolheaded
Skill
1
Channel 1 Frost.
Draw 1 card.
Coolheaded Channels Orbs for Runic Capacitor to work withChannel 1 Frost.
Draw 1 card.
Darkness
Skill
1
Channel 1 Dark.
Trigger the passive ability of all Dark Orbs.
Darkness Channels Orbs for Runic Capacitor to work withChannel 1 Dark.
Trigger the passive ability of all Dark Orbs.
Fusion
Skill
1
Channel 1 Plasma.
Exhaust.
Fusion Channels Orbs for Runic Capacitor to work withChannel 1 Plasma.
Exhaust.
Glasswork
Skill
1
Gain 5 Block.
Channel 1 Glass.
Glasswork Channels Orbs for Runic Capacitor to work withGain 5 Block.
Channel 1 Glass.
Null
Attack
2
Deal 10 damage.
Apply 2 Weak.
Channel 1 Dark.
Null Channels Orbs for Runic Capacitor to work withDeal 10 damage.
Apply 2 Weak.
Channel 1 Dark.
Rainbow
Skill
2
Channel 1 Lightning.
Channel 1 Frost.
Channel 1 Dark.
Exhaust.
Rainbow Channels Orbs for Runic Capacitor to work withChannel 1 Lightning.
Channel 1 Frost.
Channel 1 Dark.
Exhaust.
Shadow Shield
Skill
2
Gain 11 Block.
Channel 1 Dark.
Shadow Shield Channels Orbs for Runic Capacitor to work withGain 11 Block.
Channel 1 Dark.
Spinner
Power
1
At the start of your turn, Channel 1 Glass.
Spinner Channels Orbs for Runic Capacitor to work withAt the start of your turn, Channel 1 Glass.
Storm
Power
1
Whenever you play a Power, Channel 1 Lightning.
Storm Channels Orbs for Runic Capacitor to work withWhenever you play a Power, Channel 1 Lightning.

Relics that synergize with Runic Capacitor

Metronome
Metronome pays 30 damage on the seventh Channel.The first time you Channel 7 Orbs each combat, deal 30 damage to ALL enemies.
Infused Core
Infused Core Channels Orbs for Runic Capacitor to work withAt the start of each combat, Channel 3 Lightning. Lightning deals 1 additional damage.
Cracked Core
Cracked Core Channels Orbs for Runic Capacitor to work withAt the start of each combat, Channel 1 Lightning.
Symbiotic Virus
Symbiotic Virus Channels Orbs for Runic Capacitor to work withAt the start of each combat, Channel 1 Dark.

Essence of Darkness Channels a Dark per slot.

✦

Related relics

Infused CoreData DiskEmotion ChipMetronomeSymbiotic VirusBreadAkabekoBone TeaBooming ConchCandelabra

Changes by version

  1. 19 Feb 2026ArtInternal playtest
    Added assets
  2. 1 May 2025AddedInternal playtest
    Added to the game

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

Purchase today
If you haven't bought Slay The Spire 2 yet, it's time. Support the devs, they made an amazing game.Get it on Steam