Crystal Beast Deck #702279 — Yu-Gi-Oh! OCG

55 Main, 15 Extra, incl. Crystal Beast Sapphire Pegasus x3, Fiendsmith Engraver x3, Mulcharmy Fuwalos x3. Created May 15, 2026 by YGO Mod.

Created by: YGO Mod (20517634)

Created On: 05/15/2026

Official AI Deck Power Analysis

MidrangeConfidence: Low

20± 8/ 100

Power Score

Structural 50

Reliability 35

Going First 50

Going Second 55

Deck — Deck Power Evaluation

Final Contextual Deck Power: 20/100 (±8 · Confidence: Low)

Overall score	Value
Structural Deck Power	50
Going First	50
Going Second	55
Meta Power	provisional
Tournament Reliability	35

Primary strategy: Midrange
Secondary strategies: Toolbox, Combo
Format: ocg

Legality

Main 55 / Extra 15 / Side 0 — status: Illegal. 10 violation(s).

Identity & game plan

Win condition: Crystal Beast board fills to 7 different names, then Ultimate Crystal Rainbow Dragon Overdrive or Rainbow Dragon (4000 ATK) closes (Inferred from card text); Fiendsmith Lacrima and Desirae boss monsters, with Luce as a 3500 ATK backup (Inferred from card text)
Turn 1 (going first): Rainbow Bridge or Crystal Bond to fetch a Crystal Beast, then Sapphire Pegasus or Ruby Carbuncle to place Continuous Spells and build toward Ultimate Crystal (Inferred)
Turn 2 (going second): Hold Ash Blossom, Droll & Lock Bird, Ghost Belle, Nibiru and Evenly Matched to stop the opponent's opening, then rebuild through Crystal Bond (Inferred)
Recovery: Crystal Beast monsters return to the Spell and Trap Zone when destroyed, and Rainbow Bridge and Crystal Bond search again (Inferred from card text)
After siding: Not available: the side deck is empty, so there is no post-side plan (Verified)

Why it scores here

The deck is scored on the system, not by averaging its cards, and its legality cap sets the final number. Rainbow Bridge and Crystal Bond give it a searcher base (P(at least one core card in a 5-card opening hand) is about 0.78 for the archetype core group), and its hand-trap package (Ash Blossom, Droll, Nibiru, Ghost Belle, Evenly Matched) gives real interaction, especially going second. The ceiling is high on paper through Ultimate Crystal Rainbow Dragon Overdrive and 4000 ATK closers, but no recorded boards exist, so median output is unmeasured. The list is illegal: seven Forbidden cards are present, and Ash Blossom, Fiendsmith Engraver and Droll exceed their copy limits. The side deck is empty, and the three archetype families (Crystal Beast, Fiendsmith, Mulcharmy) are only 18.6% exact-name, so consistency is capped. The Crystal Beast popularity figure (71% inclusion for several staples) confirms the list is real but did not earn points.

Dimension scores

#	Dimension	Score	Evidence
D1	Engine Accessibility & Consistency	55	Rainbow Bridge and Crystal Bond searchers reach the core: P(at least one Rainbow Bridge in a 5-card opening hand) is 0.25 per 3-copy card, and the archetype core group is 0.78 (Inferred)
D2	Opening-Hand Quality & Brick Management	45	11 hand traps, 18 tech cards and 21 singletons mean many hands mix dead or conflicting pieces; proxy P(no core card in hand5) is 0.22 (Inferred)
D3	Combo Conversion & Ceiling	60	No parseable boards; the ceiling is read from text only through Ultimate Crystal Overdrive and the 7-name Crystal Beast condition (Inferred)
D4	Combo Floor & Median Output	40	combos_evidence reports 0 boards, so median output is unmeasured and set low from starter diversity alone (Provisional)
D5	Interruption Resilience & Route Redundancy	55	Several independent starters (Rainbow Bridge, Crystal Bond, Sapphire Pegasus, Ruby Carbuncle) and 11 hand traps give some route redundancy (Inferred)
D6	Resource Economy, Recovery & Grind	55	Crystal Beast Continuous Spell recursion and Mulcharmy and Santa Claws draw effects add recovery; no resource data exists (Inferred)
D7	End-Board & Interaction Quality	65	14 negate or removal cards (Ash Blossom, Droll, Nibiru, Ghost Belle, Evenly Matched, Crystal Miracle, Harpie's Feather Duster) with 11 hand-trap flags (Inferred)
D8	Going-Second & Board-Breaking Power	55	Hand-trap density going second is strong (P(at least one hand trap in hand6) is 0.76), but board-breaking depends on Forbidden cards that cannot be played (Inferred)
D9	Offensive Pressure & Closing Power	65	Rainbow Dragon (4000 ATK) and Ultimate Crystal Overdrive (4000 ATK) are the closers; the direct-attack Amethyst Cat is minor (Verified stat, Inferred role)
D10	Main Deck Efficiency & Flexibility	40	55 main cards with 34 distinct; exact-name archetype purity is 18.6% (13 of 70 copies), with 57 off-archetype copies across Fiendsmith, Mulcharmy and generics (Verified)
D11	Extra Deck Efficiency & Coverage	45	15 Extra Deck cards split across Crystal, Fiendsmith, Lswarm, Red-Eyes, D/D and others; 4 of 15 are Forbidden (Verified)
D12	Side Deck Adaptability	10	The side deck has 0 cards, so there is no post-side plan (Verified)
D13	Matchup Coverage & Format Fit	30	No tournament link or dated meta sample; archetype share is unknown and the list is illegal in its current form (Provisional)
D14	Pilotability & Error Tolerance	35	The multi-archetype engine (Crystal Beast, Fiendsmith, Mulcharmy) and Ultimate Crystal stacking need several conditional decisions per turn; no example combo steps exist (Inferred)

How the score was computed

Strategy profile: Midrange. Structural ≈ 50, Going First ≈ 50, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 35. Modifiers: banlist exposure (-8); copy-limit overage (-2); empty side deck (-2). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers = 0.80*50 + 0.20*35 - 12 = 35; Illegal cap applied, score = min(35, 20) = 20

Probability & combo summary

Opening a starter: P(≥1) ≈ 0.25 · key two-card combo ≈ — · full-brick estimate ≈ 0.22 (all Inferred)
Combo output: best PowerIndex —, median —, board-per-starter —
Turn order: 0 going-first lines vs 0 going-second lines

Strengths

Searcher base through Rainbow Bridge and Crystal Bond
Hand-trap and negate package with 11 hand-trap flags
Strong closers at 4000 ATK

Weaknesses

Illegal list: Forbidden cards and copy-limit overages
Empty side deck
Low archetype purity (18.6%) across three families

Critical choke points

Crystal Bond and Rainbow Bridge as the only searchers for the Crystal Beast core
Ultimate Crystal condition (7 different names) for the top-end closers

Recommended changes

Priority	Remove	Add	Reason
1	Called by the Grave, Triple Tactics Talent, Dimension Shifter, Red-Eyes Dark Dragoon, Number 60: Dugares, D/D/D Wave High King Caesar, Number 41: Bagooska	Legal replacements from the same role (hand trap, searcher or Extra Deck closer)	Forbidden cards make the list unplayable; the score cannot exceed its legality cap until they are gone
2	1 Ash Blossom & Joyous Spring, 2 Fiendsmith Engraver, 1 Droll & Lock Bird	Legal singleton or copy-limited replacements	Reduces copy-limit violations to zero
3	None	A 15-card side deck matched to expected opponents	Gives a post-side plan for best-of-3 and raises D12 from 10

Evidence & confidence

Verified: Legality: 7 Forbidden cards and 3 copy-limit overages; Main 55 and Extra 15 are within size rules; Side deck is 0 cards; Archetype exact-name purity 18.6%; Usage: 9 of 16 core cards present
Inferred: Hypergeometric draw odds (Main Deck only); Engine redundancy and brick estimates from card text; Hand-trap strength going second; Closing power from 4000 ATK text
Provisional: Median and floor output (no boards); Matchup and format fit (no meta sample); Meta Power (null)
Data gaps: no combos supplied, so combo floor/median/ceiling is text-only inference no tournament link, so archetype meta-share and per-pilot match record are absent no win-rate telemetry exists in YGOVN, so going-first/second and matchup signals are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied

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