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11 Spirit Stone Categories are the effect families that Spirit Stones are organised into in Beast of Reincarnation. Each stone belongs to one of five categories, and players slot stones from across the categories into Emma's armour to compose a parry-driven build.
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33 The Five Categories
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5-Pre-release gameplay deep dives have confirmed the five effect families. Each category is a different lane the player can lean into when building a Spirit Stone loadout.
5+Every stone carries exactly one stat boost, drawn from the list below, alongside its own individual effect. The stat boost is what the categories name; the effect is what actually separates two stones in the same category. A handful of stones raise maximum FP instead, which sits outside the five.
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77 CategoryEffect FocusBuild DirectionHPMaximum health, healing on trigger, and survival cushion.Sustain builds that lean on long fights rather than fast resolutions.AttackRaw outgoing damage, particularly on the parry-driven punish window.Damage-forward builds that convert each parry into a meaningful chunk of HP off the enemy.DefenseIncoming damage mitigation and resilience against the harder hits in late-arc encounters.Tank-leaning builds that turn parries into safety windows rather than damage spikes.Skill PowerImproves the strength of Emma's combat skills and the impact of Bloom Arts fired through Koo's Command System.Hybrid builds that use the parry rhythm to amplify both sword work and Koo's plant abilities at once.Critical RateHigher chance for outgoing strikes to land as critical hits.Burst builds that stack parries into a damage-spike window, often paired with faster katanas.
88 Slot Economy
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1010 Spirit Stones are slotted into armour rather than into the katana. The number of available slots scales with the armour piece.
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12-Standard armour. Four Spirit Stone slots.Upgraded armour. Up to six Spirit Stone slots, available through later-arc upgrades.
12+Standard armour. Slot counts belong to the armor set, not to a tier. Each of the fourteen sets carries its own number, listed alongside its defense and elemental resistance.Upgraded armour. Up to six Spirit Stone slots, available through later-arc upgrades.
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1414 Slot count is the practical cap on how many categories a build can lean on at once. A four-slot loadout is forced to specialise; a six-slot loadout can hold a primary category plus two or three supporting categories without diluting the primary effect.
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16-Trigger Behaviour
16+Effect Triggers
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18-Spirit Stone effects fire on successful Parry System. The parry that defines real-time combat in Beast of Reincarnation is also the trigger that activates every equipped stone simultaneously, which means category choice multiplies on chained parries rather than firing independently.
18+The more useful way to sort the catalogue is by what sets a stone off, because that is what has to line up with a build. Parry is one trigger among many rather than the universal one.
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20-BeatStone BehaviourSingle clean parryEvery equipped stone fires its category effect once.Chained parriesEffects compound across the chain. An Attack-leaning slate spikes damage over consecutive parries; a Critical-Rate slate stacks crit chance into the punish window.Failed parry / hit takenNo category effects fire. The build is also the highest-variance build in the game, because giving up a parry gives up the entire turn's payoff.
20+TriggerExamplesWhat FiresStart of battleFortification, Onslaught, Entanglement StoneOpens the fight with a Fortitude or Vigor buff, or with the Entanglement Gauge and Koo's FP already part-filledParry, dodge, riposteEntangled Parry, Entangled Dodge, Entangled RiposteA percentage chance to return 0.2 of the Entanglement Gauge and a point of FPExecution or assassinationEntangled Assassination, Final Infusion, Final BreathReturns gauge and FP, or a slice of Emma's maximum HPKilling anythingEntangled ConquestReturns gauge and FP on any combat killLow healthWell of Fortitude, Well of Vigor, Mortal Awakening, Double-Edged SwordTrades safety for output, or hands back defense once Emma drops below halfRanged workSharpshooter, Homing Shots, Empowered Headshots, Faster Reloads, Fire RateAdds tracking, headshot damage, reload speed or crossbow fire rateStatus deathsLast Lightning, Infernal EndShocked or burning enemies discharge on death, hitting everything within several metresBloom ArtsFlorescent Recovery, Transcendent BloomHeals over time on activation, or adds damage and stagger while Koo's bar is fullStanding conditionsMomentum, Dark Approach, Critical Mind, Stone Mind, Iron WallPassive multipliers that apply while Emma is at full health, unseen, healing, or simply always
21+Stones level up, and most of them scale in five ranks, so the same stone is a different proposition at rank 1 and rank 5. Upgraded Blighted variants of stones also exist with higher numbers than the base version.
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2123 Category Pairings
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2325 PairingIdentityAttack + Critical RateBurst aggressor. Maximises damage per parry chain.HP + DefenseSurvival anchor. Turns each parry into mitigation rather than damage.Skill Power + AttackHybrid duo. Each parry pays into both Emma's sword damage and Koo's Bloom Arts output.Skill Power + HPSustain caster. Leans on Bloom Arts as the main damage source while keeping Emma alive in the open.
2426 Acquisition
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26-Spirit Stones are found through exploration, with category drops distributed across the game's districts and zones. Pre-release material has framed acquisition as a parallel discovery loop to Charms and Katanas, with each system rewarding off-path investigation rather than purchase or craft.
28+Spirit Stones are found through exploration, pulled from strongboxes, and dropped by Malefacts as Spirit Stone Ore. High-tier stones drop from elite enemies, which is why the Chapter 8 experience farm doubles as a stone farm. They can also be duplicated at the Cleanse Walker workbench once enough electronic brains have been collected to raise the Calculations research. Acquisition runs as a parallel discovery loop to Charms and Katanas, with each system rewarding off-path investigation rather than purchase or craft.
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28-Notes on Pre-Release Coverage
30+Counting the Catalogue
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30-Specific stone names, individual effect strengths, and the full per-category catalogue have not been published in detail. The five-category structure and the parry-trigger behaviour are what current gameplay deep-dive material has consistently confirmed. Expect this article to grow once the launch build exposes the full per-stone catalogue.
32+Both of the independent guide catalogues list around thirty-five named stones, and their rosters differ slightly at the margins, so no exact total is stated here. The category structure and the trigger groupings above hold regardless of where the final count lands.