Crystal Beast Deck #774735 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 25/100 (±8 · Confidence: Low)

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

Legality

Main 50 / Extra 21 / Side 0 — status under the rules at evaluation time: Illegal. 8 violation(s).

Identity & game plan

• Win condition: Crystal Beast Rainbow Dragon (legal copy), Ultimate Crystal Rainbow Dragon Overdrive and Perfectron Hydradrive Dragon as Extra Deck closers; Snake-Eyes Flamberge Dragon as the Snake-Eye finisher; Crystal Beast beatdown with Amethyst Cat direct attacks and Topaz Tiger / Amber Mammoth pressure
• Turn 1 (going first): Open on Crystal Bond or Rainbow Bridge (Inferred from text) to search a Crystal Beast monster or Crystal spell, then set up a Sapphire Pegasus / Ruby Carbuncle Continuous Spell chain toward Rainbow Dragon. Expect a 2-card bootstrap in roughly 85% of hands (Inferred).
• Turn 2 (going second): Use Ash Blossom, Infinite Impermanence, Maxx C or Forbidden Droplet to interrupt the opponent's first engine, then rebuild through Snake-Eye Ash and Crystal Bond recursion (Inferred).
• Recovery: Crystal Beast monsters that are destroyed in a Monster Zone can be placed face-up in the Spell & Trap Zone as Continuous Spells, and Rainbow Bridge of Salvation plus Crystal Miracle recur the engine from the GY (Verified text, Inferred use).
• After siding: No Side Deck is registered, so there is no post-side plan. Scoring the Extra Deck and Side Deck as absent (Verified).

Why it scores here

This deck is scored as a connected system and not as an average of its card scores. It opens reliably: the 15-copy Crystal Beast core gives about an 85% chance of at least one core card in an opening 5-card hand (Inferred), and the 18 searcher-text cards give about 90% to find one. It converts through a Crystal Beast Continuous Spell chain toward Rainbow Dragon and strong Extra Deck closers, but the combo ceiling is text-only because no recorded boards exist. Interaction is decent (Ash Blossom, Infinite Impermanence, Maxx C, Forbidden Droplet) but thin once the seven Forbidden cards are removed. Popularity and archetype usage did not earn points, and no score was averaged from individual cards. The list is Illegal under OCG rules (seven Forbidden copies and a 21-card Extra Deck), so this is a theoretical structural read capped at 25 and not a valid power score.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 55.9, Going First ≈ 54, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 50. Modifiers: banlist exposure (-8); extra deck over capacity (-4). Final formula: Illegal list: No-meta formula 0.80*55.9 + 0.20*50 = 54.7, minus 12 total modifiers = 42.7, capped at 25 for an Illegal deck (theoretical/structural-only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.85 · key two-card combo ≈ — · full-brick estimate ≈ 0.15 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Dense Crystal Beast core (15 copies) with a searcher-text count of 18, giving reliable starts
• Strong Extra Deck closers: Rainbow Dragon, Ultimate Crystal Rainbow Dragon Overdrive, Perfectron Hydradrive Dragon
• Layered recursion through Crystal Beast Continuous Spell placement and Rainbow Bridge of Salvation

Weaknesses

• Illegal under OCG rules: seven Forbidden copies and 21 Extra Deck cards
• Several singleton tech and hand traps that can dead-draw
• No Side Deck, so there is no post-side adaptation

Critical choke points

• Crystal Beast Sapphire Pegasus and Crystal Bond as the first searches, which the opening hand has to hit
• Forbidden Extra-Deck cards removed during legalisation, which will break the current line

Recommended changes

Evidence & confidence

• Verified: Legality: 7 Forbidden copies and Extra Deck size 21 (over 15); Main Deck size 50, within 40-60; Card text and stats for the 50+ distinct cards
• Inferred: Opening-hand probabilities (0.85 core, 0.91 searcher, 0.15 brick proxy); Engine chain and recovery plans read from card text; Interaction and resilience reads from hand-trap and removal text
• Provisional: Meta Power (null; no dated metagame sample); Matchup and format fit (D13); Median combo floor (D4)
• Data gaps: No combos supplied; combo floor, median and ceiling are text-only inference No tournament link; archetype meta-share and per-pilot record absent No win-rate telemetry for going-first, going-second, matchups or bricks Meta Power is Provisional without a dated metagame sample No Side Deck is registered