Therions Deck #769069 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 48/100 (±8 · Confidence: Medium)

• Primary strategy: Midrange
• Secondary strategies: Toolbox, Combo
• Format: ocg

Legality

Main 56 / Extra 14 / Side 0 — status: Legal with warning.

Identity & game plan

• Win condition: Union monsters equipped onto Extra Deck bosses (ABC-Dragon Buster, Underworld Goddess, Psychic End Punisher, Juraishin) and a board-breaking end phase; Beast King Barbaros tribute summon destroying all opposing cards; Lightning Storm and Harpie's Feather Duster clearing the opponent's backrow and attack-position monsters
• Turn 1 (going first): Search with Union Hangar, Union Activation or Therion Discolosseum, add or Normal Summon a LIGHT Machine Union monster, equip it, then Extra Deck into a boss monster
• Turn 2 (going second): Hold interaction (Evenly Matched, Droll & Lock Bird, Simul Archfiends, Lightning Storm) and use Extra Deck board-breakers or Union equip lines to answer the established board
• Recovery: Union Pilot and Union Driver can re-equip or re-Special Summon from the field or GY, Union Activation recurs from the GY, and Mulcharmy Fuwalos and Pot of Sloth replenish cards
• After siding: None: the list runs no Side Deck, so there is no post-side plan and no best-of-3 adaptation

Why it scores here

The deck is scored as one system on consistency, interaction, board-breaking and closing power, not as an average of its card scores. Its opening-hand reliability is moderate: 16 search-text cards give an 83% chance of at least one searcher in five cards, but any single 3-copy engine piece is only about 25% to appear in the opener, and the Union chain needs several pieces in order. Interaction is the strongest part of the list, with Lightning Storm, Harpie's Feather Duster, Simul Archfiends, Evenly Matched, Droll & Lock Bird and a negating Therion King Regulus, while the Extra Deck supplies several board-breaking bosses. Brick risk is high, however: six Field Spell copies, Set Rotation, Terraforming and Magical Mid-Breaker Field are conditional or dead without the right board state, and the 70 off-archetype copies mean the engine is a Union/ABC/A-to-Z build that only carries the Therions label. Archetype usage shows only 2 of 21 standard core cards present, and the deck has no Side Deck, so neither popularity nor a post-side plan earned points; no combo boards were recorded, so the ceiling and median are text-only inferences.

Dimension scores

How the score was computed

Strategy profile: Midrange weights used; Toolbox treated qualitatively, not blended numerically. Structural ≈ 54, Going First ≈ 57, Going Second ≈ 62, Meta = provisional, Tournament Reliability ≈ 42. Modifiers: Scattered engine / off-archetype build (-2); Banlist exposure (-1); Unresolved passcode (-1). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional; no dated metagame sample)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.25 · 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 searcher text (16 cards, 83% to find one in 5 cards) keeps the deck from missing its whole plan
• Broad interaction: Lightning Storm, Harpie's Feather Duster, Simul Archfiends, Evenly Matched, Droll & Lock Bird, Therion King Regulus negate
• Extra Deck board-breakers and closers: Underworld Goddess, Psychic End Punisher, Juraishin, ABC-Dragon Buster, XYZ-Hyper Dragon Cannon
• Union recursion from the field and GY (Union Pilot, Union Driver, Union Activation) supports multi-turn resilience

Weaknesses

• Any single 3-copy engine piece has only about 25% to appear in the opening hand
• Six Field Spell copies plus Set Rotation, Terraforming and Magical Mid-Breaker Field create conditional dead cards
• 70 off-archetype copies and only 2 of 21 standard archetype core cards present, so the list is a splash-heavy toolbox
• No Side Deck, so there is no best-of-3 adaptation
• No recorded combo boards, so the ceiling and median are unverified

Critical choke points

• Union monsters need a LIGHT Machine target on the field to equip to, and Unauthorized Reactivation needs a Machine monster to equip
• Lightning Storm needs the controller to have no face-up cards, and Harpie's Feather Duster and Droll & Lock Bird are single-copy answers
• Union Controller and ABC-Dragon Buster need specific LIGHT Machine Union materials from the hand, field or GY

Recommended changes

Evidence & confidence

• Verified: Legality: 56 main, 14 extra, 0 side; within OCG size rules; all restricted cards at or under limit; Restricted cards: Droll & Lock Bird, Harpie's Feather Duster, Magical Mid-Breaker Field, Set Rotation, Terraforming (Limited, 1 copy each); Probability figures: 0.2487 (3 copies, 5-card hand), 0.2929 (3 copies, 6-card hand), 0.8277 searcher group, 0.373 hand-trap group going second; Usage: 2 of 21 standard archetype core cards present (9.5%)
• Inferred: Engine consistency and brick rate from hypergeometric odds and card text; Union equip chain and Extra Deck board-breaker reads from card text; Going-first and going-second structural estimates
• Provisional: Meta and format fit (D13) without a dated metagame sample; Post-side and matchup performance (no data)
• 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 Passcode 10443957 unresolved and counted as main No win-rate telemetry: going-first, going-second, matchup and brick rates unknown Meta Power is Provisional unless a dated metagame sample is supplied No Side Deck, so side adaptability cannot be measured