Cyclone Deck #773783 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±8 · Confidence: Low)

• Primary strategy: Combo
• Secondary strategies: Toolbox
• Format: master-duel

Legality

Main 40 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Ritual Summon Nephthys monsters (Cerulean Sacred Phoenix, Devotee, Conductor) via Rebirth of Nephthys, then Link/Synchro boards with Nephthys, the Sacred Flame and Nephthys, the Sacred Preserver; Sacred Phoenix of Nephthys recursion from the GY after a card-effect destruction, plus Raigeki and Lightning Storm as one-sided board wipes
• Turn 1 (going first): Pre-Preparation of Rites or Disciple/Chronicler searches a Nephthys, then Rebirth of Nephthys Ritual Summons a Conductor or Phoenix, which chains to a second Nephthys search (Inferred, text-only; no recorded boards)
• Turn 2 (going second): Hand Matriarch or Defender to force a Nephthys Special Summon and rebuild through the GY; Raigeki and Lightning Storm are the only board answers, and the deck has no hand traps (Inferred)
• Recovery: Nephthys GY effects (Chronicler, Defender, Disciple, Sacred Phoenix) return cards from GY to hand or field after a card effect destroys them, with Matriarch and Last Hope as spare removal (Inferred)
• After siding: Not evaluable: the deck runs no Side Deck, so there is no post-side plan (verified by side_count 0)

Why it scores here

This list is Illegal in Master Duel: Pot of Extravagance is run 2 copies against a Limited 1 and Herald of the Arc Light is run 3 copies against a Limited 1, so the normal Final Contextual score is capped and the evaluation is structural-only. The deck is labelled Cyclone, but its own composition is Nephthys-dominant (32 of 55 copies, exact-name purity 3.6%), so the score is for the Nephthys ritual-and-link system rather than the Cyclone label. The structural read comes from a Rebirth of Nephthys Ritual engine with 11 searcher-text cards (P at least one searcher in a 5-card hand about 0.82, Inferred), recursion through Nephthys GY effects, and Link/Synchro boards that carry real interaction and closing power. The deck's floor is held back by a low single-starter rate (P at least one Rebirth in a 5-card hand about 0.34, Inferred), a deck of 22 non-Nephthys copies that dilutes the engine, and zero hand traps and zero side cards, which leaves no answer on the going-second turn or after a sideboarding step. No combos were recorded, so the combo ceiling and median are text-only inference; popularity and archetype usage stats were not used to raise any score.

Dimension scores

How the score was computed

Strategy profile: Combo primary; Toolbox secondary disclosed as context only, weights not blended. Structural ≈ 50, Going First ≈ 48, Going Second ≈ 42, Meta = provisional, Tournament Reliability ≈ 35. Modifiers: Illegal list cap (-5); Banlist exposure (-8); No side deck (-4). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional) = 47 before modifiers; modifiers -12 gives 35; Illegal cap applied, final score 30

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.34 · key two-card combo ≈ — · full-brick estimate ≈ — (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Ritual engine with 11 searcher-text cards gives high access to the starter
• Nephthys GY recursion provides route redundancy after destruction
• Link and Synchro boards with negation and removal text give real interaction
• Cerulean Sacred Phoenix and Nephthys the Sacred Flame give closing power

Weaknesses

• Illegal copy-limit violations (Pot of Extravagance 2 vs 1; Herald of the Arc Light 3 vs 1)
• Off-archetype dilution: 53 copies outside the Nephthys core
• No side deck and no hand traps
• No recorded combos or win-rate telemetry, so the ceiling and floor are unverified

Critical choke points

• Rebirth of Nephthys is the only Ritual Spell entry point, at about 0.34 in a 5-card opening hand
• Going second relies on Matriarch/Defender forcing a Nephthys Special Summon, with no hand-trap answer

Recommended changes

Evidence & confidence

• Verified: Main deck 40 and Extra deck 15 meet master-duel size rules; Pot of Extravagance 2 copies over its Limited 1 limit; Herald of the Arc Light 3 copies over its Limited 1 limit; Side deck count is 0; Exact-name archetype purity 3.6% (Nephthys-dominant composition); No combos, no tournament link, no guides
• Inferred: Rebirth of Nephthys starter probability about 0.34 in a 5-card hand; Searcher density about 0.82 in a 5-card hand; Going-first and going-second plans from card text only; Structural 50 and final 30 from the weighted dimension scores
• Provisional: Meta Power (null) and format fit (D13); Tournament reliability 35
• Data gaps: No recorded combos (combos_evidence.total_combos 0), so ceiling, median and floor are text-only inference No tournament link: archetype meta-share and per-pilot match record absent No win-rate telemetry exists in YGOVN for going-first/second, matchup or brick rates Meta Power is Provisional unless a dated metagame sample is supplied Deck title is null and archetype label Cyclone does not match a Nephthys-dominant list No guides for the archetype (guides_evidence total 0)