Atlantis, City of the Sea Dragon Deck #774050 — Yu-Gi-Oh! TCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±10 · Confidence: Low)

• Primary strategy: Midrange
• Secondary strategies: Toolbox, Tempo
• Format: tcg

Legality

Main 57 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 3 violation(s).

Identity & game plan

• Win condition: Umi-field Extra Deck pressure: Synchro/XYZ/Link bosses (Poseidra Abyss, Graydle Dragon, Icejade Gymir Aegirine, Azure Ocean Dragon Lord) enabled by Atlantean/Mermail searchers and Level-reduction via Atlantis, City of the Sea Dragon (Inferred); Abysstrite / Levia-Dragon of Atlantis - Daedalus Special Summons from Umi-linked searches (Inferred)
• Turn 1 (going first): T1: Penguin/Mermail/Atlantean searcher chain into Atlantis, City of the Sea Dragon and Advent of Atlantis to make Umi, then Synchro or XYZ into a 3000-ATK boss (Inferred from card text; no recorded boards)
• Turn 2 (going second): Hand traps (Ash Blossom x3, Ghost Ogre x2, Droll & Lock Bird x1) and Dominus Impulse to stop the opponent's first Special Summon, then rebuild the Atlantean engine through searches (Inferred)
• Recovery: Mermail/Atlantean searchers plus Mulcharmy draw effects and Warchief of Atlantis GY recursion to refill the hand after a disrupted turn (Inferred)
• After siding: Not evaluable: no Side Deck is present in the export, so there is no post-side plan (Verified absence)

Why it scores here

The deck reliably opens an engine: the 15-copy Atlantean/Mermail/Atlantis core gives roughly an 80% chance of at least one starter in a 5-card opening hand, and about 88% for at least one searcher (Inferred, from hypergeometric estimates). Conversion into pressure depends on Umi-field Extra Deck summons (Poseidra Abyss, Graydle, Icejade, Neo-Daedalus Rage at 2800-3000 ATK), which is the main reason the closing score is moderate-high. Interaction is layered through hand traps and negation text, but Ash Blossom and Dominus Impulse are run three copies against a Semi-Limited limit of two, which makes the list illegal and caps its contextual score. The score is structural and theoretical: it comes from consistency, median-to-ceiling output read from card text, and interaction on the system as a whole, not from Atlantis being a known archetype or from averaging the individual card scores. Popularity and usage statistics confirmed the list is real but earned no points, and no recorded boards exist to ground the median.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 53.5, Going First ≈ 55, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-8); side deck absent (-4). Final formula: Illegal cap applied: 0.80*53.5 + 0.20*40 = 50.8; modifiers total -12 → 38.8; capped at 30 as a theoretical, structural-only score (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.8 · 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

• Large searcher density (19 searcher-text cards) gives high starter access
• Layered negation and hand-trap coverage (13 negation-text cards, 6 hand traps)
• Strong Extra Deck closing bosses at 2800-3000 ATK

Weaknesses

• Illegal copy counts for Ash Blossom and Dominus Impulse
• No side deck, so no best-of-3 adaptability
• Scattered off-theme Extra Deck and tech slots reduce consistency

Critical choke points

• Atlantis, City of the Sea Dragon and Advent of Atlantis as the Umi enabler; without Umi most Level-reduction and summon lines stall
• Single-copy key cards (Atlantis, Levia-Dragon, Monster Arms, Warchief) limit redundancy

Recommended changes

Evidence & confidence

• Verified: Illegal copy counts: Ash Blossom and Dominus Impulse at 3 copies vs legal 2; Main 57 and Extra 15 are within size rules; Side is 0; Archetype core-group probability and searcher-text counts from the evidence
• Inferred: Starter and searcher access probabilities used for D1/D2; Umi and Level-reduction combo reads from card text; Going-first and going-second plans and hand-trap coverage
• Provisional: Meta Power (null) and matchup/format fit (D13); Floor and median output (D4) with no recorded boards
• Data gaps: no combos supplied — combo floor/median/ceiling is text-only inference no tournament link — archetype meta-share and per-pilot match record absent no win-rate telemetry exists in YGOVN (going-first/second, matchup, game-level, brick/starter/OTK rates) — those signals are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied Side deck is empty; no post-side evidence Deck title is null in the export