Defect Build

💥 Overcharge Detonation

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

Flood every orb slot, then Evoke the whole board at once

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

AAdvanced

channelevokeorbsburstcombo

Win condition: Maximize the number of orbs Channeled, then convert them all at once: Barrage scales damage by orb count, Shatter Evokes everything, and Quadcast/Multi-Cast empty your rightmost orb repeatedly for one giant burst turn.

A-Tier
Tier: Advanced
Difficulty: 10
Core cards: Explosive combo finisher
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.

Runic CapacitorCore
Three extra slots is the single biggest multiplier for Barrage and Shatter.
Infused CoreStrong
Three free Lightning each combat is a head start on filling the board.
Cracked CoreStrong
A free orb every fight speeds the windup.
MetronomeStrong
Channeling 7 orbs is exactly what this deck does; the 30 AoE comes for free.
Gold-Plated CablesSituational
Boosts the rightmost orb you funnel Quadcast and Multi-Cast into.
Bag of PreparationSituational
Extra opening cards help you load the board a turn faster.

Game plan

How to play

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

Open by buying Orb Slots
Play Capacitor and Modded early to widen the board. The more slots you have, the bigger every detonation payoff is, so slot count comes before damage.
Flood the board, then hold
Channel aggressively with Chaos, Tempest, Fusion, and the basic Channelers to fill every slot, but don't waste Evoke payoffs on a half-full board.
Detonate with Barrage or Shatter
Once slots are full, Barrage converts orb count straight into a huge single hit, while Shatter Evokes the whole board for AoE. Pick Barrage for single targets, Shatter for crowds.
Stack the rightmost orb for Multi-Cast
If you have a heavy Lightning or Dark orb on the right, Quadcast and Multi-Cast Evoke it several times for far more than a single Evoke would deliver.
Refill with Reboot between bursts
Reboot shuffles your deck and redraws, so after a detonation turn you can dig back to your Channelers and rebuild the board for the next big play.

Honest take

Pros & cons

Strengths

Enormous single-turn burst that bypasses enemy block windows.
Flexible payoff: Barrage for single target, Shatter for AoE.
Scales cleanly with cheap, common Channel cards plus slot relics.

Weaknesses

Needs setup turns; weak before the board is loaded.
Hard-capped by Orb Slots, so without Runic Capacitor or Capacitor it underperforms.

Opening

Mulligan & priorities

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

Keep Capacitor or Modded to widen the board before you commit to filling it.
Keep cheap Channelers (Chaos, Zap, Cold Snap) to start loading slots immediately.
Keep one payoff (Barrage or Shatter) so your filled board has an exit.
Toss Multi-Cast or Quadcast turn 1 with an empty board; they need a charged orb first.

Map strategy

Pathing

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

Orb Slot relics are mandatory

Runic Capacitor is your top relic; the whole build scales with slot count. Capacitor and Modded in the deck reinforce it.

Bring some defense or speed

You spend turns loading before you burst, so pick up Block cards or Bag of Preparation to survive the windup against fast enemies.

Avoid these

Common mistakes

Detonating Barrage or Shatter before the board is full, leaving damage on the table.
Skipping Orb Slot gains; with default slots the build flat-out doesn't scale.
Letting Tempest overflow when slots are already full, wasting Lightning.
Using Quadcast/Multi-Cast on a weak rightmost orb instead of a stacked one.
Going all-in on offense with no Block and dying during the multi-turn windup.

Quick answers

FAQ

Common questions about the Overcharge Detonation Defect build.

Is Overcharge Detonation good in Slay the Spire 2?

Yes, it is a reliable A-tier combo finisher that converts a full orb board into one devastating turn. It is weak before the board is loaded and hard-capped by Orb Slots, so it ranks just below the Storm engine but rewards decks that find slot relics.

Best cards for an Evoke burst Defect build?

Barrage scales damage by your Channeled orb count and Shatter Evokes the entire board for AoE, making them your two finishers. Quadcast and Multi-Cast Evoke the rightmost orb several times, while Chaos and Tempest fill slots fast so nothing is wasted.

What relics does Overcharge Detonation want?

Runic Capacitor is the single biggest pickup because the whole build scales with slot count for Barrage and Shatter. Infused Core and Cracked Core give free orbs to speed the windup, and Metronome rewards the wide board you are already building.

When should I detonate Barrage or Shatter?

Wait until your slots are full so you cash out the maximum payoff; detonating on a half-loaded board leaves damage on the table. Pick Barrage for single targets and Shatter for crowds, and avoid letting Tempest overflow when slots are already maxed.

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