Therions Deck #772126 — Yu-Gi-Oh! OCG
50 Main, 19 Extra, incl. X-Cross Cannon x3, Unauthorized Reactivation x3, Union Activation x3. Created Oct 21, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/21/2026
Main Deck (50)
- Beast King Barbaros x1
- Droll & Lock Bird x1
- Maxx "C" x1
- Mulcharmy Fuwalos x2
- Mulcharmy Purulia x2
- Spell Canceller x1
- Therion "King" Regulus x1
- X-Cross Cannon x3
- X-Head Cannon x1
- Ash Blossom & Joyous Spring x2
- A-Assault Core x1
- B-Buster Drake x1
- C-Crush Wyvern x1
- Union Driver x1
- Union Pilot x1
- Y-Yare Head x2
- Z-Zillion Tank x2
- Clockwork Night x1
- Crossout Designator x1
- Terraforming x1
- Triple Tactics Talent x1
- Unauthorized Reactivation x3
- Union Activation x3
- Union Hangar x3
- Angel Statue - Azurune x1
- Anti-Spell Fragrance x1
- Dominus Purge x2
- Dominus Spark x2
- Gozen Match x1
- Infinite Impermanence x1
- Mistake x1
- Red Reboot x1
- Simul Archfiends x1
- Solemn Judgment x1
- Summon Gate x1
Extra Deck (19)
- ABC-Dragon Buster x2
- Union Controller x2
- XYZ-Hyper Dragon Cannon x2
- Charmer Quartet in Bloom x1
- Curious, the Lightsworn Dominion x1
- Knightmare Gryphon x1
- Lyna the Light Charmer, Lustrous x1
- Platinum Gadget x1
- Silhouhatte Rabbit x1
- Cyber Dragon Nova x1
- Divine Arsenal AA-ZEUS - Sky Thunder x1
- Eclipse Twins x2
- Starring Knight x1
- Super Starslayer TY-PHON - Sky Crisis x1
- Tellarknight Ptolemaeus x1
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25± 8/ 100
Power Score
Structural
45
Reliability
40
Going First
45
Going Second
40
Deck — Deck Power Evaluation
Final Contextual Deck Power: 25/100 (±8 · Confidence: Low)
| Overall score | Value |
|---|---|
| Structural Deck Power | 45 |
| Going First | 45 |
| Going Second | 40 |
| Meta Power | provisional |
| Tournament Reliability | 40 |
- Primary strategy: Midrange
- Secondary strategies: Toolbox
- Format: ocg
Legality
Main 51 / Extra 19 / Side 0 — status under the rules at evaluation time: Illegal. 7 violation(s).
Identity & game plan
- Win condition: Union-monster equip engine that Special Summons LIGHT Machine Union monsters and Fusion/Xyz/Link extra-deck boards (ABC-Dragon Buster, XYZ-Hyper Dragon Cannon) for board pressure; Therion King Regulus (2800 ATK) as a Level 8 beatstick with a negate-on-activation effect
- Turn 1 (going first): Search a Union monster or Union Hangar with a searcher (Union Activation, B-Buster Drake, A-Assault Core), equip or Special Summon Union monsters, then go to an extra-deck summon. The pool gives no card-by-card turn-1 route beyond that, so treat this as Inferred
- Turn 2 (going second): Hold Ash Blossom, Droll & Lock Bird, Maxx C, Red Reboot, Solemn Judgment and Dominus Purge to interrupt the opponent's engine, then rebuild board with Regulus or Union monsters. Inferred from card text
- Recovery: Recur Union monsters through Unauthorized Reactivation and Union Activation's GY effect, and rebuild with Union Pilot and Union Driver equips. Inferred from card text
- After siding: Not evaluable: the deck has no side deck, so there is no post-side plan
Why it scores here
The deck is Illegal in OCG: five Forbidden cards are run, and the Extra Deck holds 19 cards against a limit of 15, so the score is capped and labelled theoretical and structural only. Its engine is a Union equip loop that can reach a starter through searchers (about 0.68 for at least one of 10 searcher-text cards in a 5-card hand, Inferred), but the deck has no recorded boards, so the ceiling and median stay low. Interaction is the strongest part of the list, with 6 hand traps and 11 negation-text cards. The score does not come from the Therions name, which has no exact-name purity (0%), nor from averaging card powers. There is no side deck, no tournament data and no meta sample, so Meta Power stays provisional.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 55 | P(at least one of 10 searcher-text cards in a 5-card hand) is about 0.68; Union engine starters are only 2-3 copies each; Inferred (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 50 | Hands mix equips, searchers and hand traps with no redundant starter, and 70 of 51 main slots are off-archetype; brick rate is estimated, not measured (Inferred) |
| D3 | Combo Conversion & Ceiling | 40 | No parseable combos (total combos 0), so ceiling is a text-only read of the ABC/A-to-Z Union line (Inferred) |
| D4 | Combo Floor & Median Output | 35 | No combo boards, so the median output cannot be measured and is not inferred from card text (Provisional) |
| D5 | Interruption Resilience & Route Redundancy | 50 | Two hand-trap interruptions and recursion via Unauthorized Reactivation give some alternate routes, but no independent second line is verified (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 45 | Union Activation and Clockwork Night give GY recursion and searches, but no resource signature was measured (Inferred) |
| D7 | End-Board & Interaction Quality | 60 | 6 hand traps, 11 negation-text cards and 21 removal-text cards give broad interaction; Forbidden copies are excluded from the score (Verified card text, Inferred quality) |
| D8 | Going-Second & Board-Breaking Power | 45 | Regulus and Barbaros supply board-breaking, and Dominus Purge and Ash Blossom answer going-second threats; no going-second split is observed (Inferred) |
| D9 | Offensive Pressure & Closing Power | 45 | Board pressure comes from ABC-Dragon Buster at 3000 ATK and XYZ-Hyper Dragon Cannon at 3000 ATK; no closing data exists (Verified stat, Inferred closing) |
| D10 | Main Deck Efficiency & Flexibility | 40 | 51 main slots include 25 single-copy cards, 36 distinct main cards, 0% exact archetype purity and an unresolved card; compactness is low (Verified composition) |
| D11 | Extra Deck Efficiency & Coverage | 40 | 19 Extra Deck cards against a limit of 15 is a hard size violation, and Forbidden Extra Deck cards are present (Verified legality) |
| D12 | Side Deck Adaptability | 15 | The deck has no side deck, so there is nothing to adapt post-side (Verified) |
| D13 | Matchup Coverage & Format Fit | 40 | No tournament link or dated meta sample; archetype meta-share is absent, so the format-fit score is provisional (Provisional) |
| D14 | Pilotability & Error Tolerance | 45 | The deck needs many decision points across Union equips, extra-deck summons and interaction timing; pilot error tolerance is moderate (Inferred) |
How the score was computed
Strategy profile: Midrange. Structural ≈ 45, Going First ≈ 45, Going Second ≈ 40, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-8); extra-deck size violation (-4). Final formula: Illegal cap: theoretical structural only. Structural 45 (Midrange profile) gives 0.80*45 + 0.20*40 = 44; modifiers -12 give 32; capped at 25 because the deck is Illegal.
Probability & combo summary
- Opening a starter: P(≥1) ≈ 0.27 · 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
- Dense hand-trap and negation package (6 hand traps, 11 negation-text cards)
- Multiple searchers (10 searcher-text cards) support engine access
- Extra Deck has Fusion, Xyz and Link boards for late-game pressure
Weaknesses
- Illegal list: five Forbidden cards and a 19-card Extra Deck
- Weak archetype purity (0% exact name, 70 off-archetype copies)
- No side deck, so no post-side adaptability
- No recorded boards, so the combo ceiling and median cannot be measured
Critical choke points
- The Union equip engine depends on a few 2-3 copy starters with no verified redundancy
- Removing Forbidden cards and the extra-deck overflow changes the whole build, so the list cannot be played as built
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | Triple Tactics Talent, Spell Canceller, Charmer Quartet in Bloom, Knightmare Gryphon, Curious the Lightsworn Dominion | Legal Union or Machine support from the Limited/Unlimited pool | Removes Forbidden cards so the list is legal |
| 2 | 4 Extra Deck cards (minimum, to reach 15) | None (cut to 15 Extra Deck cards) | Restores the OCG Extra Deck limit |
| 3 | Single-copy off-archetype tech | A 15-card side deck with hand-trap and Union-specific answers | Gives post-side adaptability and reduces brick risk |
Evidence & confidence
- Verified: Illegal status: five Forbidden cards and Extra Deck size 19 > 15; Limited and Semi-Limited copy counts match the banlist; Usage stats: Regulus in 94.7% of Therion decks; Droll in 63.2%
- Inferred: Union engine accessibility and P(starter) estimates; Interaction quality from hand-trap and negation text; Going-first and going-second plan descriptions
- Provisional: Meta Power (no dated metagame sample); Format fit (no tournament link)
- Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot match record absent One passcode (10443957) could not be resolved to a card and is counted as main No side deck, so post-side performance cannot be assessed No win-rate telemetry exists in YGOVN Meta Power is Provisional unless a dated metagame sample is supplied
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