Mermail Deck #771788 — Yu-Gi-Oh! OCG
47 Main, 18 Extra, incl. First Penguin x3, Mulcharmy Purulia x3, Neptabyss, the Atlantean Prince x3. Created Oct 21, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/21/2026
Main Deck (47)
- Abyssrhine, the Atlantean Spirit x1
- Atlantean Dragoons x2
- Atlantean Heavy Infantry x1
- Barrier Statue of the Torrent x1
- Click & Echo x1
- Coralianectes, the Luminous Cradle Dragon x1
- Droll & Lock Bird x1
- First Penguin x3
- Levia-Dragon of Atlantis - Daedalus x1
- Maxx "C" x1
- Monster Arms of Atlantis x1
- Mulcharmy Purulia x3
- Neptabyss, the Atlantean Prince x3
- Poseidra, the Storming Atlantean x2
- Siren Vortex of Atlantis x1
- Submarineroid x1
- Warchief of Atlantis x3
- Magicalibra x1
- Ash Blossom & Joyous Spring x2
- Icejade Ran Aegirine x2
- Advent of Atlantis x2
- Atlantis, City of the Sea Dragon x2
- Call of Atlantis x1
- Fish Sonar x1
- Foolish Burial Goods x1
- Instant Fusion x1
- Sea Stealth II x1
- Daedalus Maelstrom x1
- Dominus Impulse x2
- Ice Barrier x1
- Sea Stealth Attack x1
- Virtue Stream x1
Extra Deck (18)
- Elder Entity Norden x1
- Super Vehicroid Jumbo Drill x1
- Azure Ocean Dragon Lord - Neo-Daedalus Rage x1
- Levia-Dragoon - Daedalus x1
- Marincess Coral Anemone x1
- Brionac, the Magical Ice Dragon x1
- Icejade Gymir Aegirine x1
- Red Dragon Archfiend x1
- Swordsoul Supreme Sovereign - Chengying x1
- White Aura Whale x1
- Deep Sea Repetiteur x1
- Abysstrite, the Atlantean Spirit x1
- Bahamut Shark x1
- LeVirtue Dragon x1
- Mermail Abyssgaios x1
- Number 101: Silent Honor ARK - Soul Asylum x1
- Poseidra Abyss, the Atlantean Dragon Lord x1
- Toadally Awesome x1
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Deck — Deck Power Evaluation
Final Contextual Deck Power: 30/100 (±10 · Confidence: Low)
| Overall score | Value |
|---|---|
| Structural Deck Power | 52 |
| Going First | 48 |
| Going Second | 46 |
| Meta Power | provisional |
| Tournament Reliability | 35 |
- Primary strategy: Midrange
- Secondary strategies: Combo
- Format: ocg
Legality
Main 47 / Extra 18 / Side 0 — status under the rules at evaluation time: Illegal. 3 violation(s).
Identity & game plan
- Win condition: Extra-Deck boss summons from the Atlantis/Umi engine (Poseidra Abyss, Abysstrite, Icejade Gymir, Azure Ocean Dragon Lord) backed by Mulcharmy and Neptabyss card advantage; Atlantean and Daedalus Link/Synchro lines (Levia-Dragoon, Levia-Dragon, Deep Sea/Abyss sub-engines) if the starter survives
- Turn 1 (going first): Open a WATER starter (First Penguin, Neptabyss, Warchief, Mulcharmy Purulia), search an Atlantis or Atlantean spell/field, and build toward a boss Extra Deck summon
- Turn 2 (going second): Use Ash Blossom, Maxx C and Droll & Lock Bird to stop the opponent's first starter, then rebuild through GY-recursive Umi effects; the deck has no recorded going-second data
- Recovery: Recover from the GY through Abyssrhine, Monster Arms and Atlantean Heavy Infantry effects that send WATER/Atlantean cards back to the field or hand
- After siding: No side deck is registered, so no post-side plan can be scored; the deck is not set up for best-of-3
Why it scores here
This list is scored as a system, not as an average of its cards. Its starters are reasonably accessible: P(at least one archetype-core card in a 5-card opener) is about 0.94, and the 12 starter copies across First Penguin, Neptabyss, Warchief and Mulcharmy give several independent opening lines (Inferred). The engine converts into strong Extra-Deck bosses, and the card advantage from the Mulcharmy and Neptabyss package supports a sustained board. Two Forbidden cards (Barrier Statue of the Torrent and Bahamut Shark) and an 18-card Extra Deck against a 15-card OCG maximum make the list Illegal, so the score is capped at 30 and labelled theoretical/structural only. The deck has no recorded combos, no tournament link, no guides and no side deck, so the floor, median and matchup dimensions rest on text-only inference, and the 1.5% exact-name archetype purity shows the engine is a mix of Atlantis, Atlantean, Umi, Abyss and Daedalus cards rather than a single archetype, which popularity does not reward.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 62 | P(at least one archetype-core card in a 5-card opener) ≈ 0.94; four 3-copy starters give independent openers (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 55 | Searcher-text group P(≥1 in opener) ≈ 0.92, but 64 off-archetype copies and multiple sub-engines raise brick and conflict risk (Inferred) |
| D3 | Combo Conversion & Ceiling | 50 | No parseable boards; ceiling read from card text of Levia-Dragoon, Neo-Daedalus Rage and Poseidra Abyss summon effects (Inferred) |
| D4 | Combo Floor & Median Output | 45 | No recorded combos, so no median or power distribution exists; scored conservatively (Inferred) |
| D5 | Interruption Resilience & Route Redundancy | 55 | Ash Blossom, Maxx C, Droll & Lock Bird and Ice Barrier give several interruption routes; GY-recursive Umi effects add recovery (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 60 | 18 searcher-text cards and GY recursion (Abyssrhine, Monster Arms, Heavy Infantry) sustain resources (Inferred) |
| D7 | End-Board & Interaction Quality | 60 | 11 removal-text and 8 negation-text cards plus Dominus Impulse and Ice Barrier give layered interaction (Inferred) |
| D8 | Going-Second & Board-Breaking Power | 50 | Three hand traps (Ash, Maxx C, Droll) and Dominus Impulse give some going-second answers, but no going-second split is recorded (Inferred) |
| D9 | Offensive Pressure & Closing Power | 62 | Boss ATKs of 2800–3000 (Poseidra Abyss, Icejade Gymir, Swordsoul Chengying, Azure Ocean Dragon Lord) give closing power (Verified stats) |
| D10 | Main Deck Efficiency & Flexibility | 50 | 47 main cards with 21 singletons and 15 non-monster cards; compact enough but with many off-archetype slots (Inferred) |
| D11 | Extra Deck Efficiency & Coverage | 30 | Extra Deck of 18 exceeds the OCG cap of 15, so the extra slots are over-used (Verified) |
| D12 | Side Deck Adaptability | 15 | No side deck registered; best-of-3 adaptability cannot be assessed (Provisional) |
| D13 | Matchup Coverage & Format Fit | 40 | No tournament link or meta sample; the list is Illegal in its format (Provisional) |
| D14 | Pilotability & Error Tolerance | 45 | Several multi-step summon lines with Extra-Deck material requirements raise pilot complexity (Inferred) |
How the score was computed
Strategy profile: Midrange. Structural ≈ 52, Going First ≈ 48, Going Second ≈ 46, Meta = provisional, Tournament Reliability ≈ 35. Modifiers: banlist exposure (-8); extra deck over limit (-4). Final formula: No reliable metagame: 0.80*Structural(52) + 0.20*TournamentReliability(35) = 48.6; modifiers -12 give 36.6; Illegal cap sets the final score at 30 (theoretical/structural only)
Probability & combo summary
- Opening a starter: P(≥1) ≈ 0.94 · key two-card combo ≈ — · full-brick estimate ≈ 0.06 (all Inferred)
- Combo output: best PowerIndex —, median —, board-per-starter —
- Turn order: 0 going-first lines vs 0 going-second lines
Strengths
- Dense WATER starter package with several 3-copy searchers
- Strong Extra-Deck bosses with 2800–3000 ATK
- Multiple hand traps and negation text for interaction
Weaknesses
- Two Forbidden cards in an OCG list
- Extra Deck of 18 over the 15-card limit
- No side deck
- Mixed sub-archetypes with 1.5% exact-name purity
Critical choke points
- Any opening hand without a WATER starter or searcher stalls the engine
- Forbidden cards make the list unplayable in OCG until removed
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | Barrier Statue of the Torrent and Bahamut Shark | Legal in-engine replacements for the two Forbidden slots | Restores legality so the list can receive a normal score |
| 2 | One Extra-Deck card of the lowest priority (6 non-core candidates) | None | Brings the Extra Deck to the 15-card OCG maximum |
| 3 | None | A 3–6 card side deck | Enables best-of-3 post-side adaptation, which is currently unscored |
Evidence & confidence
- Verified: Legality: 2 Forbidden cards run and Extra Deck 18 > 15; Copy limits for Limited and Semi-Limited cards are respected; Main Deck size 47 is inside 40–60
- Observed: No observed combos or tournament records
- Inferred: Opening-hand consistency estimates from hypergeometric draws; Dimension scores D1–D14 from card text and composition
- Provisional: Meta Power (null) and matchup fit (D13)
- 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 side deck registered — post-side plan unscored no win-rate telemetry exists in YGOVN — 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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