Defect Build

❄️ Permafrost Bastion

Name: 10 Easy Tips For Defect Builds in Slay the Spire 2
Channel: Ic0n Gaming

Frost orbs and Focus build an unbreakable wall that grinds enemies down

Updated for Early Access patch 0.104.0· Updated 2026-06-06

ABeginner

frostblockdefensefocuscontrol

Win condition: Out-defend everything. Frost orbs and Focus give you more Block than enemies can punch through, while Hailstorm and end-of-turn Frost evokes slowly but surely close out the fight.

A-Tier
Tier: Beginner
Difficulty: 10
Core cards: Reliable, forgiving survivor
Power

Reviewed by SpireForge Editorial

Updated 2026-06-06

Strategy informed by Caleb Gannon Gaming, Ic0n Gaming

Deck core

Core cards

The cards this build is built around — prioritize these on every run.

Must-pick

Flex picks

Synergy

Relic priorities

What to grab from shops, bosses and chests to power the engine.

Data DiskCore
Permanent Focus scales every single Frost Block tick.
Runic CapacitorStrong
More slots means more Frost resident and more Block per turn.
AnchorStrong
Ten free Block at combat start covers your slow first turn.
GorgetStrong
Four Plating each combat stacks on top of your Frost wall.
Emotion ChipSituational
On any turn you slip and take a hit, every Frost orb re-triggers for extra Block.
Gold-Plated CablesSituational
Doubles your rightmost Frost orb's Block tick.

Game plan

How to play

Step-by-step through the run, from opening hands to the win.

Front-load Focus, then Channel Frost
Drop Defragment early so every Frost orb you Channel afterward gives more Block. Then start filling slots with Cold Snap, Coolheaded, and Glacier.
Keep Frost on the board for Hailstorm
Hailstorm only fires if you have Frost at end of turn, so avoid Evoking your last Frost orb. Let the passives tick for Block and let Hailstorm chip the enemy down.
Widen orb variety for Coolant
Coolant pays per unique orb, so mixing in a Lightning or Dark orb alongside Frost raises your start-of-turn Block. Compile Driver also draws per unique orb, smoothing your hand.
Use Glacier as your tempo defend
Glacier gives immediate Block and Channels two Frost, so it is your best single card for surviving a big telegraphed hit while still building the engine.
Close with Ice Lance or Shatter
When the enemy is low, Ice Lance delivers a big hit plus three more Frost, and Shatter Evokes every orb at once for a burst of damage if the grind is taking too long.

Honest take

Pros & cons

Strengths

Extremely forgiving; you simply don't die while the engine wins.
Frost and Focus scale into late Act 3 without needing rare payoffs.
Coolant and Hailstorm turn defense into a passive offense that never stops.

Weaknesses

Damage is slow, so long enemy soft-enrage timers can be tense.
Weak if you can't find any Focus and rely on flat Frost Block alone.

Opening

Mulligan & priorities

What to keep, what to ditch in your opening hands.

Keep Defragment to start scaling Frost Block immediately.
Keep Glacier or Cold Snap for early Block plus orbs.
Keep Hailstorm so your passive win condition is online as soon as possible.
Toss Ice Lance turn 1; it's expensive and you want orbs and Focus down first.

Map strategy

Pathing

How to route the map to assemble the build and stay healthy.

Take defensive and Focus relics

Anchor and Gorget give free early Block; Data Disk gives permanent Focus that scales every Frost orb. Runic Capacitor lets you hold more Frost at once for bigger ticks.

Avoid over-Evoking

This deck wants orbs to sit and tick, so skip heavy Evoke payoffs that empty your slots; keep Frost resident for Coolant and Hailstorm.

Avoid these

Common mistakes

Evoking your last Frost orb and turning off Hailstorm for the turn.
Skipping Focus, which leaves Frost Block flat and lets the grind outlast you.
Stacking only Frost when Coolant and Compile Driver reward unique orb types.
Treating it as a damage deck; the kill comes from Hailstorm chip and a single Shatter/Ice Lance, not raw attacks.
Letting your hand clog with attacks you don't need instead of cycling with Coolheaded.

Quick answers

FAQ

Common questions about the Permafrost Bastion Defect build.

Is Permafrost Bastion good in Slay the Spire 2?

Yes, it is the most forgiving Defect build because Frost orbs scale Block with Focus faster than enemies can punch through it. You rarely die while Hailstorm and end-of-turn evokes grind the room down, which makes it an A-tier survivor that is great for newer players.

Best cards for a Frost Defect build?

Glacier and Cold Snap give immediate Block plus Frost, while Coolant rewards a wide spread of unique orbs with start-of-turn Block. Hailstorm is the passive win condition, dealing AoE every turn you hold Frost, and Defragment scales all of that Block with Focus.

What relics does Permafrost Bastion want?

Data Disk is the core pickup because permanent Focus scales every Frost Block tick. Anchor and Gorget cover your slow opening turns with free Block and Plating, and Runic Capacitor lets you keep more Frost resident for bigger ticks.

How does the deck actually win if its damage is low?

The kill comes from Hailstorm chipping the enemy every turn plus a single Shatter or Ice Lance when they are low, not from raw attacks. You out-defend everything and let the passive AoE close the fight, so avoid Evoking your last Frost orb and turning Hailstorm off.

Provenance

Sources & video guides

This build's strategy is informed by these community creators.

10 Easy Tips For Defect Builds in Slay the Spire 2
Ic0n Gaming·24K·20:59