Ojama Deck #765340 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 51/100 (±8 · Confidence: Medium)

• Primary strategy: Midrange
• Secondary strategies: Control, Toolbox
• Format: master-duel

Legality

Main 40 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Reptile Synchro/Link boards (Melusine, Hydra, Echidna) and Vaskii removal, enabled by the 0-ATK monster interaction package; Single-copy Extra Deck beaters (Beelzeus, Beelze, TY-PHON) when their materials are available
• Turn 1 (going first): Open a Reptilianne starter or searcher (Ramifications, Coatl, Nyami, Lamia, Scylla) and use the 0-ATK effects to make the opponent's monsters or your own tokens targetable and tributable (Inferred)
• Turn 2 (going second): Use Medusa, Gorgon, Poison or Vaskii to turn the opponent's attackers into 0-ATK monsters, then convert the board with a Reptile Synchro (Inferred)
• Recovery: Gardna, Nyami and Spawn recur Reptilianne monsters from the GY, and Ramifications rebuilds the hand (Inferred from card text)
• After siding: No side deck (0 side cards), so there is no post-side plan; the deck must win through the main deck alone

Why it scores here

The deck reliably opens a Reptilianne starter in most hands: 15 copies across five starter-type cards give roughly a 92% chance of at least one in a 5-card opening hand (Inferred hypergeometric). Its plan converts through 0-ATK control effects (Medusa, Gorgon, Poison, Vaskii) that neutralize opposing attackers and then Synchro or Link boards built from Reptile monsters. Many engine cards carry conditions such as a Reptile in the GY, a 0-ATK monster on the field, or an all-Reptile board, which lowers consistency and raises brick risk, so the structural score is held down. There is no combo data and no tournament or win-rate evidence, so the ceiling and median are text-based inference and Meta Power stays provisional. Popularity of the Ojama label and the Reptilianne archetype's usage share were not credited; the score comes from the system's consistency, interaction density and conversion on paper, not from averaging card scores.

Dimension scores

How the score was computed

Strategy profile: Midrange primary; D13 dropped and weights renormalized over 95 points (meta-neutral). Structural ≈ 56, Going First ≈ 55, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 52. Modifiers: Conditional 0-ATK / Reptile-GY engine (-3); Unrecoverable choke at single-copy extra deck pieces (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional); Structural = 5365/95 ≈ 56.5 with D13 dropped; 0.80*56.5 + 0.20*52 ≈ 55.6, then modifiers −5 → 51

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.92 · key two-card combo ≈ — · full-brick estimate ≈ 0.08 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Consistent 3-copy core: 10 cards at 3 copies, so the Reptilianne starters are repeatable
• Layered 0-ATK interaction (Medusa, Gorgon, Poison, Vaskii, Zerozerock) that shuts down attackers and summon-dependent lines
• Reptile count (31) lets Melusine and Hydra Synchro summon reliably and gives recursion through Gardna and Nyami

Weaknesses

• Many conditional engine cards (Reptile in GY, 0-ATK on field, all-Reptile board) raise brick and dead-card risk
• No side deck, so no post-side adaptability
• No combo, win-rate, tournament or matchup evidence, so the ceiling and median are inferred

Critical choke points

• A 0-ATK monster on the field gates Recoil, Lamia, Vaskii tribute and Nyami's GY summon
• Vaskii needs two 0-ATK monsters to tribute; without tokens or Naga/Naga-type fodder it stalls
• Single-copy Beelze and Beelzeus need a DARK Tuner and two-plus materials

Recommended changes

Evidence & confidence

• Verified: Main 40 / Extra 15 / Side 0 within Master Duel size rules (0-40/60 main, 0-15 extra); All distinct cards are Unlimited under BanMasterDuel; Copy histogram 3×10, 2×3, 1×4 sums to 40 main cards; Extra Deck breakdown: Link 5, Synchro 8, Xyz 2 sums to 15; Starter and interaction card text as listed in the evidence
• Inferred: P(≥1 starter-set card in 5 cards) ≈ 0.92 and full-brick ≈ 0.08 (hypergeometric); Going-first and going-second plans from card text; D1–D14 dimension scores and structural weights
• Provisional: Meta Power and D13 matchup fit (no dated metagame sample)
• Data gaps: Deck title is null Archetype label 'Ojama' conflicts with the Reptilianne engine (exact-name purity 5.5%) Usage-statistics join is inconsistent: Echidna, Melusine, Hydra, TY-PHON, Beelze, Beelzeus, Phoenix and S:P Little Knight appear in the card list with copies but are marked in_this_deck:false in usage_statistics, so core_present_pct (68) is unreliable 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; going-first/second, matchup and brick rates are Inferred Meta Power is Provisional without a dated metagame sample