Ursarctic Deck #663003 — Yu-Gi-Oh! OCG

56 Main, 16 Extra, incl. Alpha, the Master of Beasts x3, Emissary from the House of Wax x3, Gadarla, the Mystery Dust Kaiju x3. Created Mar 14, 2026 by YGO Mod.

Created by: YGO Mod (20517634)

Created On: 03/14/2026

Official AI Deck Power Analysis

ComboConfidence: LowEvaluated Oct 20, 2026

30± 10/ 100

Power Score

Structural 53

Reliability 45

Going First 55

Going Second 48

Deck — Deck Power Evaluation

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

Overall score	Value
Structural Deck Power	53
Going First	55
Going Second	48
Meta Power	provisional
Tournament Reliability	45

Primary strategy: Combo
Secondary strategies: Midrange, Synchro
Format: ocg

Legality

Main 56 / Extra 16 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

Win condition: Synchro-based board of Ursarctic Level 7+ monsters (Septentrion, Grand Chariot, Polar Star, Polari) that converts into attack pressure and removal; Ursarctic Megatanus / Megabilis / Megapolar beatdown and Mitsurugi ritual board presence
Turn 1 (going first): Open Ultimate Bright Knight Ursatron Alpha or an Ursarctic searcher (Departure, Mikpolar, Miktanus), Tribute a Level 7+ monster to Special Summon a second Ursarctic, then Synchro Summon from the Extra Deck (Inferred)
Turn 2 (going second): Use Nibiru and Ursarctic hand-side Special Summons or the hand traps (Emissary, Nibiru) to break the opening board, then rebuild through searchers (Inferred)
Recovery: Ursarctic Departure and Mikpolar/Miktanus recover Ursarctic monsters from the Deck and GY; Ursarctic Radiation and Big Dipper re-enable Special Summons (Inferred, text-only)
After siding: Not evaluable: the deck runs no Side Deck (Side Deck size 0)

Why it scores here

The deck's real engine is Ursarctic: 33 exact-name copies plus 2-3 copies of the Level 7+ Tuners and searchers, with a hypergeometric estimate of about 0.83 that the 16-copy core group is present in a going-first opening hand (Inferred). The searcher density (24 copies, about 0.95 for at least one searcher in hand, Inferred) gives it a reliable route to a second Synchro-enabling monster. Recorded boards are absent (combo data has zero parseable boards), so the ceiling and median are text-only inferences, and both are scored conservatively. The deck is illegal as built: Baronne de Fleur is Forbidden and the Extra Deck runs 16 cards against a 15-card OCG limit, so the score is capped at 30 and labelled theoretical/structural-only. Popularity and archetype usage did not add points, and no card scores were averaged into the deck result.

Dimension scores

#	Dimension	Score	Evidence
D1	Engine Accessibility & Consistency	60	P(at least one of the 16 Ursarctic core in a going-first 5-card hand) ≈ 0.83; the 2-card Synchro bootstrap is less certain (Inferred)
D2	Opening-Hand Quality & Brick Management	50	24 searcher-text copies and 3 hand traps support hand quality, but 45.8% exact-name purity and 39 off-archetype copies add dead-card risk (Inferred)
D3	Combo Conversion & Ceiling	50	No parseable boards; the ceiling is read only from card text, e.g. Grand Chariot's destruction effect and Septentrion's negation (Inferred, text-only)
D4	Combo Floor & Median Output	45	No recorded median output; median is set below ceiling because the Synchro route needs a specific Level 7 monster on the field (Inferred)
D5	Interruption Resilience & Route Redundancy	55	Multiple Ursarctic starters and Departure/Mikpolar recovery give redundant lines, but the Synchro route has a single-choke Extra Deck dependency (Inferred)
D6	Resource Economy, Recovery & Grind	55	Ursarctic Departure, Mikpolar and Radiation recycle Ursarctic cards from the Deck and GY, which offsets the Tribute cost (Inferred from card text)
D7	End-Board & Interaction Quality	55	21 removal-text and 6 negation-text cards plus 3 hand traps give layered interaction; Grand Chariot and Septentrion add board-wide negation (Inferred semantic read)
D8	Going-Second & Board-Breaking Power	50	Nibiru, Emissary and the Level 7+ Synchro set provide going-second board-breaking, but there is no going-second combo data (Inferred)
D9	Offensive Pressure & Closing Power	65	Septentrion and Grand Chariot reach 3000 and 2700 ATK, with Nibiru 3000 ATK; the Extra Deck is capped at 16 cards (Verified stat, Inferred closing)
D10	Main Deck Efficiency & Flexibility	60	56 main-deck cards sit within the 40-60 range; 3-copy core with 23 Level 8 and 14 Level 0 cards gives reasonable Synchro flexibility (Verified count, Inferred coherence)
D11	Extra Deck Efficiency & Coverage	45	Extra Deck runs 2x each of four Ursarctic Synchros plus 8 single-copy Synchros and 1 Fusion; it exceeds the 15-card limit by one, and Baronne is a Forbidden slot (Verified)
D12	Side Deck Adaptability	40	No Side Deck (Side Deck size 0); post-side plan is not evaluable (Verified count, Provisional)
D13	Matchup Coverage & Format Fit	40	No tournament link or dated meta sample; meta-share is unknown (Provisional)
D14	Pilotability & Error Tolerance	50	Tribute-based Ursarctic summons and Synchro route require several decision points per turn (Inferred from card text)

How the score was computed

Strategy profile: Combo primary, Midrange secondary; structural 53 computed on the Combo profile. Structural ≈ 53, Going First ≈ 55, Going Second ≈ 48, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist exposure (-8); extra-deck overflow (0). Final formula: Illegal cap applied: uncapped 0.80*53 + 0.20*45 - 8 ≈ 43, capped to 30 (theoretical/structural-only). Meta provisional.

Probability & combo summary

Opening a starter: P(≥1) ≈ 0.83 · 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

Redundant Ursarctic Level 7+ Tuner set and 24 searcher-text copies give a reliable first-turn engine (Inferred)
Layered interaction: 21 removal-text, 6 negation-text cards, 3 hand traps (Inferred)
Ursarctic Synchro set provides board-wide negation and attack pressure at 2700-3000 ATK (Verified stat)

Weaknesses

Illegal as built: Forbidden Baronne de Fleur and a 16-card Extra Deck (Verified)
Only 45.8% exact-name Ursarctic purity; 39 off-archetype copies (Verified)
No recorded boards, so ceiling and median are unmeasured (Verified gap)

Critical choke points

Single Level 7+ Tribute enabler for Ursarctic Synchro summons (Inferred)
Extra Deck slot count: one Forbidden card must be removed before the list can be played (Verified)

Recommended changes

Priority	Remove	Add	Reason
1	Baronne de Fleur (Forbidden, 1 copy in Extra Deck)	none required	Removing this card fixes both the Forbidden violation and the 16 to 15 Extra Deck overflow, making the list legal at 56 main, 15 extra, 0 side. Re-evaluate after the change; the score cap would then lift.

Evidence & confidence

Verified: Forbidden status and copy limit violation for Baronne de Fleur; Extra Deck size 16 over OCG limit of 15; Main Deck size 56 within 40-60; Exact-name purity 45.8%; Archetype stat list and card text for 22+ cards
Inferred: Going-first hand estimate of about 0.83 for the Ursarctic core; Synchro bootstrap and recovery lines from card text; Going-second board-breaking from Nibiru and hand traps; Interaction density from text flags
Provisional: Meta Power (no dated metagame sample); Matchup and format fit (no tournament data)
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/second, matchup, or brick rate Meta Power is provisional unless a dated metagame sample is supplied usage statistics in this deck flags conflict with the deck list for Ursarctic Grand Chariot, Polar Star, Polari and Septentrion (listed as absent but present with 2 copies each in the Extra Deck); core-card presence is unreliable deck title is null

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More OCG Info

Ursarctic Breakdown