Last updated: 5 September 2026

Slay the Spire 2 Defect Build Guide Orbs, Focus & Glass Cannon

The Defect returns in Slay the Spire 2 as the series' combat automaton: 75 base HP, the Cracked Core starter relic (channels 1 Lightning Orb at the start of every combat), and a play pattern built around Orbs — persistent effects that keep generating value every turn without needing a card play. It's the most mechanically dense of the returning cast, and Slay the Spire 2 gives it a genuinely new tool: a fifth Orb type, Glass, that fixes the original game's biggest Defect weakness — multi-enemy fights. This guide covers the Focus mechanic, all five Orb types, the three strongest archetypes, and the relics worth prioritising.

01Defect Unique Mechanics

Everything about the Defect flows from two systems: Orbs and Focus.

• Orb slots — you start each combat with 3 Orb slots (expandable with cards like Capacitor). Channelling an Orb into a full row pushes out the oldest Orb, triggering its Evoke effect immediately — so slot management is part of the decision-making, not just a resource cap.
• Passive vs. Evoke — every Orb has two effects: a small Passive effect that triggers automatically at the end of your turn for every Orb currently slotted, and a larger Evoke effect that triggers once, either from a card that Evokes an Orb on demand or when the Orb gets pushed out of a full slot.
• Focus — the Defect's signature stat, functioning like Strength or Dexterity but for Orbs. Each point adds +1 to the Passive value of Lightning, Frost, and Glass Orbs (Glass benefits twice over, since its Evoke deals double its current Passive value). Dark Orbs are the one exception — their damage value always starts at 6 and grows purely from being slotted, completely unaffected by Focus — and Plasma ignores Focus entirely. Cards like Defragment grant permanent Focus and are a high-priority pickup for most Defect decks, but they do nothing for a Dark- or Plasma-heavy hand.
• Starting kit — Cracked Core (channel 1 Lightning at combat start), plus the cards Zap (channel 1 Lightning) and Dualcast (Evoke your rightmost Orb twice) in your starting deck.

The five Orb types:

• Lightning — Passive: deals damage to a random enemy. Evoke: deals a larger burst of damage to a random enemy. The default offensive Orb.
• Frost — Passive: gain Block. Evoke: gain a larger burst of Block. The default defensive Orb — a Frost-heavy hand can make the Defect nearly unkillable.
• Dark — Passive: its stored damage value increases every turn it's slotted. Evoke: deals damage equal to its current stored value to the enemy with the lowest HP. A single Dark Orb left to grow for several turns before being Evoked can one-shot a boss.
• Plasma — Passive: gain Energy. Evoke: gain more Energy. The only Orb Focus doesn't boost, since it generates a resource rather than damage or Block.
• Glass — new to Slay the Spire 2. Passive: deals damage to all enemies, then decreases its own damage value by 1 (down to a floor of 0). Evoke: deals double its current Passive value to all enemies. Glass is the Defect's answer to swarms — every other Orb targets one enemy at a time or heals/blocks, so Glass is the only source of repeatable group damage in its kit.

02Archetype 1: Orb & Focus (the reliable default)

Stack Focus, then let a small rotation of Lightning and Frost Orbs generate value every single turn without needing to play new cards. This is the most consistent Defect archetype and the one to default to when a run doesn't offer a strong alternative.

Core cards:

• Defragment (Power) — permanent +1 Focus. The single most important card for this archetype; prioritise it over almost anything else you see in Act 1.
• Hotfix / Synchronize (Skill) — temporary Focus that lasts only until the end of the current turn, not the rest of combat. Hotfix grants a flat amount at 0 cost; Synchronize scales with how many unique Orb types you have channelled. Because the Focus expires that same turn, play these on your biggest damage/Block turn rather than banking them early.
• Zap / Ball Lightning / Lightning Rod — Lightning Orb channellers of increasing cost and value (Zap and Lightning Rod are Skills, Ball Lightning is an Attack that also deals direct damage). Fill your slots with these early so Focus has something to multiply.
• Tesla Coil — a 0-cost Attack that triggers every Lightning Orb's Evoke effect at once against a single target. A strong finisher once you have 2–3 Lightning Orbs slotted and Focus stacked.
• Voltaic — channels a number of Lightning Orbs equal to how many Lightning Orbs you've already channelled this combat, then Exhausts (the upgraded version doesn't Exhaust), scaling explosively in a turn built around heavy Lightning channelling.

Prioritise Frost Orbs on Elite and boss turns where you expect heavy incoming damage, and lean Lightning when you're racing down a weaker enemy. Because Focus boosts both equally, you can rebalance your Orb mix mid-fight without losing value — that flexibility is this archetype's biggest strength over Claw or Glass Cannon.

03Archetype 2: Glass Cannon (new to Slay the Spire 2)

Channel and Evoke Glass Orbs rapidly to shred multi-enemy rooms — something the original game's Defect struggled with, since Lightning and Dark both single-target. This is the strongest pick against Act 2's crowded mob rooms and any Elite that summons adds.

• Glass's Passive damages every enemy on the field every single turn, so even a single Glass Orb sitting in a slot is doing free group damage while you play other cards — you don't need to build an elaborate engine for it to pull weight.
• Because its Passive value decays by 1 each turn, Glass rewards a churn playstyle: channel a fresh one, get 1–2 turns of high Passive value, Evoke it near its natural expiry for the AoE burst, then channel another rather than letting it sit and decay to nothing.
• Focus still applies to Glass, so a hybrid Focus/Glass Cannon build — a handful of Focus sources plus heavy Glass channelling — covers both single-target bosses and mob rooms without a full rebuild between fights.
• Glass Cannon is the most forgiving archetype for players still learning Orb-slot management, since "channel Glass, let it tick, Evoke before it decays too far" is a simpler loop to execute than juggling Dark Orb timing or Shiv-style burst windows.

04Archetype 3: Claw (the aggressive alternative)

Claw is a 0-cost Attack that deals damage scaling with how many times any copy of Claw has been played so far this combat. Multiple copies of Claw plus cards that let you replay it (All for One, Feral) create a snowballing damage engine independent of Orbs entirely.

• The build lives or dies on getting Claw copies and replay enablers early — without them, Claw is just a below-average 0-cost Attack with no scaling to speak of yet.
• All for One — puts every 0-cost card from your discard pile back into your hand. In a deck full of Claws, this alone can chain into a lethal turn.
• Claw doesn't interact with Focus or Orb slots at all, which makes it a genuinely different way to play the Defect — useful when a run offers strong Claw payoffs but weak Orb support (few Orb-channelling cards, no Defragment).
• Across build comparisons, Claw is generally considered the mathematically weakest of the Defect's archetypes at equal investment — it's the pick when the run hands you Claw synergy specifically, not a build to force by passing up better Orb or Focus offers.

05Key Relics for the Defect

• Power Cell — at the start of each combat, adds 2 zero-cost cards from your draw pile into your hand. No direct connection to Orb slots, but the guaranteed 0-cost cards are strong fuel for a Claw build and a mild draw-smoothing bonus for any deck.
• Data Disk — start every combat with 1 Focus already stacked. A straightforward power spike for the Orb/Focus archetype, though unlike Defragment it resets each combat rather than carrying across the whole run.
• Gold-Plated Cables — your rightmost Orb's Passive effect triggers an additional time each turn. Effectively doubles that slot's passive value — best when you've settled on a primary Orb type to stack there.
• Emotion Chip — if you lost HP last turn, triggers the Passive effect of every Orb you have slotted at the start of this turn. A comeback tool that rewards keeping a full Orb board, not a Frost-specific pickup.
• Ornamental Fan / Kusarigama — Attack-count relics that reward playing several Attacks in a turn; useful in a Claw build where you're chaining many 0-cost Attacks per turn, less useful for a pure Orb build where you rarely play more than 1–2 Attack cards.
• Iron Club — draws a card every 4 cards you play, of any type, not just Attacks. A general-purpose card-draw relic that fits any Defect build, Claw included.

06Tips for Playing the Defect

• Pick up Defragment over almost anything in Act 1 if you see it — permanent Focus compounds across the entire run in a way temporary Focus and one-off damage cards don't.
• Don't neglect Glass just because it's new. Players coming from the original Slay the Spire default to Lightning/Frost out of habit — Glass alone solves mob rooms that used to be the Defect's worst matchup.
• Watch your Orb slot count before channelling. Channelling into a full row force-Evokes your oldest Orb whether you wanted the burst yet or not — sometimes that's free value, sometimes it wastes a Dark Orb you were still growing.
• Let Dark Orbs cook when you can afford to. A Dark Orb's Evoke damage is based entirely on how long it's been sitting in a slot — Evoking it turn one wastes almost all of its potential.
• Claw and Orbs don't combine well. If you're committing to a Claw build, deprioritise Orb-channelling cards even if they look individually strong — a half-Claw, half-Orb deck is weaker than a focused version of either.
• Early Access note: Slay the Spire 2 is actively patched and Orb values in particular have shifted between builds. Cross-reference in-game card text if a number here looks off.