Discover everything you need to know about the best Defect builds in Slay the Spire 2, including the best cards and relics.
The Defect is a playable character in Slay the Spire 2 who fights using orbs and powerful combos. This character comes with a core mechanic involving Orbs that you channel into slots to trigger passive effects.
You can customize the Defect into very different styles depending on the cards and relics you choose for a run. Boosting Focus early makes orbs much more powerful during the run.
Table of contents
How The Defect Works
The Defect is a character who uses elemental spheres and provides effects each turn or when evoked for powerful actions. He basically channels orbs to trigger passive effects or can be evoked for strong bursts. Defect can use Lightning Orbs, Frost Orbs, Dark Orbs, and Plasma Orbs to dominate enemies in combat. You start with 3 orb slots and can add more with cards or relics for additional flexibility.
Defect starts with 75 HP, 99 gold, and the Cracked Core relic to channel a Lightning orb at the beginning of each combat in Slay the Spire 2. Play a run with Necrobinder to unlock The Defect. Winning or losing a run doesn’t affect your progression towards unlocking this character. Defect is all about creating a board of orbs, managing Focus, and choosing when to Evoke them.
Claw Mechanics
Claw is a unique mechanic of The Defect that offers a 0‑cost Attack card. It deals minimal damage to enemies and permanently increases the damage of all Claw cards for the rest of that combat. Claw can create its own 0‑cost aggressive archetype, allowing you to spam cheap attacks and boost claw damage.
Your strategy should be to add multiple Claw cards to your deck and play Claw repeatedly each turn for bonus damage. After that, use cards that help draw and replay Claws.
Scrape and All for One are the best cards that allow you to draw many cards and bring back all your 0‑cost cards from the discard pile. Hologram, Seek, and Rebound are the card tutors that allow you to get Claws or draw engines from your discard. Orbs don’t affect the Claw decks because they focus on cycling lots of cards.
Orb Mechanics
The Defect also uses the Orbs to provide automatic passive effects every turn. Each orb you Channel fills the rightmost slot, as you start a fight with only three orbs. Focus is a stat of this character that increases how strong orb effects are.
Lightning Orbs deal damage to a random enemy at the end of the turn, while Frost Orbs grant Block at the end of the turn. Dark Orbs provide damage each turn, and Plasma Orbs grant extra Energy at the start of your turn.
Orbs trigger automatically every turn without energy cost, giving you automatic buffs and bonuses. The rightmost orb gets Evoked if you try to evoke or fill up slots with more Orbs. You can gain or lose orb slots during a run, and more slots let you hold more orbs, but they can slow triggering Evoke effects. Prefer the Focus cards early to make the orb engine more effective.
Best Claw Deck Build
The Claw Deck build focuses on 0‑Energy attacks that deal damage and permanently increase the damage of all Claw cards. This setup doesn’t include any orb mechanic, as it revolves purely around Claw cards. Panache, Violence, and Madness are the strongest cards for the Claw Deck.
Reprogram, Steam Barrier, or other 0‑cost cards are the best utility cards that add more actions. Make sure to use draw engines like Scrape to cycle your deck fast. All for One is your big turn‑finisher that brings back all your 0‑cost cards for massive damage.
Your goal for this setup is to keep your deck small enough so you draw Claws and support cards often. Nuclear Battery, Shuriken, Kunai, and Ornamental Fan are the best relics for the Claw Back.
Best Common and Uncommon Cards
Choose the best Common and Uncommon cards for the Claw Deck that help you spam Claws, cycle hands fast, and boost the overall damage. Here are the best cards to use while running this build in Slay the Spire 2.
| Card | Card Type | Effect |
| Claw | Common Card | Increases all Claws’ damage every time you play it. |
| Beam Cell | Common Card | helps you increase effective damage by applying Vulnerable. |
| Flash of Steel | Common Card | Support 0‑cost spam and often help draw or cycle. |
| Scrape | Uncommon Card | Allows you to discard expensive cards so you can cycle Claws fast. |
| Hologram | Uncommon Card | Get back crucial cards like Claw or Scrape. |
| Seek | Uncommon Card | Allows you to replay your key zero‑cost cards. |
Best Core Cards
Choose the Core Card for Claw Deck that deals massive damage, and keep up the momentum. A strong Claw deck is less about raw damage and more about consistency. Here are the best core cards for The Defect in Claw Deck.
| Card | Effect |
| All in One | Deals damage and gets all 0‑cost cards from your discard pile. |
| Go for the Eyes | Applies Weak to add defense while keeping spamming the attack. |
| Machine Learning | Helps you find Claws and engines faster. |
| Skim | Draw support to help you find Claws and 0‑cost cards. |
| Secret Weapon | Put an attack from your draw pile into your hand. |
Best Relics
Choose the relics that enhance your attack spam, draw consistency, and 0‑cost card recursion. Kunai, Nunchaku, and Kusarigama are also the best options to choose for the Claw Deck in Slay the Spire 2.
| Relic | Effect |
| Nuclear Battery | Provides extra energy every turn without needing orbs |
| Iron Club | Gain extra card draw based on how many cards you play. |
| Shuriken | Gain +1 Strength when you play 3 attacks in one turn. |
Orb Deck Build
This is a unique setup that allows you to channel elemental Orbs into your orb slots and use their passive effects every turn. Keep in mind that the deck doesn’t depend on playing attack or block cards because the orbs work once channeled.
Make sure to channel another orb to force an Evoke when all the slots are full. The objective for you is to maintain a balance between offense, defense, and utility by choosing the orb type. Using the card like Defragment increases both passive and Evoke effects of Orbs. You need to keep Orbs in slots for steady damage or block.
Best Common and Uncommon Cards
Choose the best Common and Uncommon cards for The Defect that give passive effects like damage, block, and energy each turn. Here are the best recommended cards to choose for the Orb Deck build in Slay the Spire 2.
| Card | Card Type | Effect |
| Ball Lightning | Common Card | Channels a Lightning Orb for damage. |
| Cold Snap | Common Card | Channels a Frost Orb for defense while also dealing massive damage. |
| Coolheaded | Common Card | Channels a Frost Orb plus draw cards. |
| Glacier | Uncommon Card | Channels two Frost Orbs for passive defense rapidly. |
| Capacitor | Uncommon Card | Enhance the Orb slots to hold more orbs for bigger passive effects. |
| Thunder | Uncommon Card | Grants additional damage potential by triggering orb effects. |
Best Core Cards For Orb Deck
The best core cards focus on channeling elemental Orbs into your orb slots for Orb Deck in Slay the Spire 2. Choose the cards that give passive effects every turn and evoke them for massive effects.
| Card | Effect |
| Defragment | Increase Focus to boost every orb’s passive effects. |
| Barrage | Deals damage for each orb you have. |
| Loop | Causes the next orb’s passive effect to trigger for an additional time |
| Voltaic | Evokes all your orbs instantly for a dramatic burst turn. |
| Compile Driver | Helps you see more orb cards faster. |
Best Relics For Orb Deck
Choose the relics for the Orb Deck that increase orb effectiveness, orb slot capacity, focus scaling, and passive triggers. Here are the best recommended relics to choose for this setup.
| Relic | Effect |
| Data Disk | Start every combat with +1 Focus, allowing you to increase the potency of every orb’s passive. |
| Runic Capacitor | Start each combat with 3 extra orb slots, giving more passive effects per turn. |
