Regent Build
🎨 Borrowed Arsenal
Flood your hand with Colorless cards and cash in on creation
Whenever you play a Colorless card, gain 1 Strength.
Upgraded: Whenever you play a Colorless card, gain 2 Strength.
Win condition: Manufacture a stream of Colorless cards each turn so Arsenal stacks Strength, Pillar of Creation drips Block, and Supermassive scales off everything you created — winning on accumulated, free value.
- A-Tier
- Tier
- Advanced
- Difficulty
- 10
- Core cards
- High-ceiling value engine
- Power
Deck core
Core cards
The cards this build is built around — prioritize these on every run.
Must-pick
Whenever you play a Colorless card, gain 1 Strength.
Upgraded: Whenever you play a Colorless card, gain 2 Strength.
Whenever you create a card, gain 3 Block.
Upgraded: Whenever you create a card, gain 4 Block.
At the start of your turn, add 1 random Colorless card into your Hand.
Upgraded: Cost changes from 2 to 1
Deal 5 damage. Deals 3 additional damage for each card you created this combat.
Upgraded: Deal 5 damage. Deals 4 additional damage for each card you created this combat.
Choose 1 of 3 random Colorless cards to add into your Hand.
Upgraded: Choose 1 of 3 random Upgraded Colorless cards to add into your Hand.
Add 3 random Colorless cards into your Hand. Exhaust.
Upgraded: Add 4 random Colorless cards into your Hand. Exhaust.
Add 1 random Colorless card into your Hand. Exhaust.
Upgraded: Add 2 random Colorless cards into your Hand. Exhaust.
Gain 7 Block. Add 1 random Colorless card into your Hand.
Upgraded: Gain 8 Block. Add 1 random Upgraded Colorless card into your Hand.
Deal 17 damage. Choose a Colorless card in your Hand. Add a copy of that card into your Hand.
Upgraded: Deal 22 damage. Choose a Colorless card in your Hand. Add a copy of that card into your Hand.
Whenever you play a card this turn, gain 1 Strength this turn.
Upgraded: Retain. Whenever you play a card this turn, gain 1 Strength this turn.
Flex picks
Choose 2 cards in your Draw Pile to Transform into Minion Strikes.
Upgraded: Choose 2 cards in your Draw Pile to Transform into Minion Strikes+.
Transform any number of cards in your Hand into Minion Sacrifice. Exhaust.
Upgraded: Transform any number of cards in your Hand into Minion Sacrifice+. Exhaust.
Deal 4 damage. Choose a card in your Hand to Transform into Minion Dive Bomb.
Upgraded: Deal 5 damage. Choose a card in your Hand to Transform into Minion Dive Bomb+.
Deal 9 damage. Add a Debris into your Hand.
Upgraded: Deal 12 damage. Add a Debris into your Hand.
Deal 7 damage. Draw 1 card. Exhaust.
Upgraded: Deal 10 damage. Draw 1 card. Exhaust.
Deal 13 damage. Exhaust.
Upgraded: Deal 16 damage. Exhaust.
Gain 9 Block. Exhaust.
Upgraded: Gain 12 Block. Exhaust.
Gain 1 Strength. Gain 1 Dexterity.
Upgraded: Gain 2 Strength. Gain 2 Dexterity.
Gain 5 Strength this turn.
Upgraded: Gain 7 Strength this turn.
Synergy
Relic priorities
What to grab from shops, bosses and chests to power the engine.
RegaliteCoreRegent relic: 2 Block whenever you create a card — stacks with Pillar of Creation for big passive defense.
Orange DoughStrongRegent relic: 2 random Colorless cards into hand at combat start — free early Arsenal/Pillar triggers.
ToolboxStrongChoose 1 of 3 Colorless cards each combat; reliable extra generation and a creation trigger.
Vitruvian MinionSituationalRegent relic doubling Minion-card damage/Block — strong if you lean on the Charge/Guards transform line.
Razor ToothSituationalPermanently upgrades each Attack/Skill you play in combat — huge in a deck that plays many cheap cards.
Snecko EyeSituationalTwo extra cards each turn and Confused costs mean more bodies to feed Arsenal; manageable with cheap generated cards.
Game plan
How to play
Step-by-step through the run, from opening hands to the win.
Honest take
Pros & cons
Strengths
- Arsenal Strength makes even tiny generated attacks meaningful over a long fight.
- Pillar of Creation gives strong, automatic defense from the same engine.
- Extremely flexible — the generated cards adapt to whatever the fight needs.
Weaknesses
- Random generation means inconsistent hands; can flood with low-impact cards.
- Needs the engine assembled before it does much; weak opening turns.
Opening
Mulligan & priorities
What to keep, what to ditch in your opening hands.
- Keep Spectrum Shift — a per-turn Colorless generator that feeds everything.
- Keep Arsenal or Pillar of Creation; the payoffs are what make generation matter.
- Keep one burst generator (Bundle of Joy, Quasar) to fill hand turn one.
- Hold Supermassive — it's weak early and a bomb late.
- Toss cards that neither generate nor pay off creation.
Map strategy
Pathing
How to route the map to assemble the build and stay healthy.
Secure a payoff first
Arsenal, Pillar of Creation, and Supermassive are the reason to generate. Grab at least one in Act 1 before loading up on raw generators.
Lean into Colorless access
Relics like Toolbox and Orange Dough hand you Colorless cards each combat; shops and ? rooms with Colorless rewards directly feed the deck. Quasar and Bundle of Joy are high picks once a payoff exists.
Avoid these
Common mistakes
- Holding generated Colorless cards instead of playing them — unplayed cards give Arsenal nothing.
- Drafting generators with no Arsenal/Pillar/Supermassive payoff; you just clog your hand.
- Playing Supermassive early when your created-count is low.
- Overfilling hand and discarding generated cards at end of turn — sequence so you actually play them.
- Forgetting that transforming cards (Charge/Guards) still counts as creating for Pillar of Creation.
Quick answers
FAQ
Common questions about the Borrowed Arsenal Regent build.
Is the Borrowed Arsenal Colorless build good in Slay the Spire 2?
Yes — it's a high-ceiling A-tier value engine. Arsenal grants Strength every time you play a Colorless card, and since nearly everything you generate is Colorless it climbs quickly while Pillar of Creation drips Block off the same generation. It needs the engine assembled first, so opening turns are weak.
What are the best cards for the Colorless creation Regent?
Spectrum Shift adds a random Colorless card every turn, while Quasar, Bundle of Joy, Jack of All Trades and Manifest Authority flood your hand. The payoffs are Arsenal (Strength), Pillar of Creation (Block) and Supermassive, which deals 3 extra damage per card created this combat.
How do you use Supermassive in this deck?
Supermassive scales off cards CREATED this combat, not this turn, so it grows the longer a fight runs. Hold it as a finisher in grindy elite and boss fights once your creation count is high rather than playing it early when it's weak.
What relics does Borrowed Arsenal want?
Regalite gives 2 Block whenever you create a card, stacking with Pillar of Creation for big passive defense. Orange Dough and Toolbox hand you free Colorless cards each combat for early Arsenal triggers, and Razor Tooth permanently upgrades every cheap card you play.
Provenance
Sources & video guides
This build's strategy is informed by these community creators.
