Phantasm Spiral Deck #770634 — Yu-Gi-Oh! TCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 25/100 (±10 · Confidence: Low)

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

Legality

Main 53 / Extra 20 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Level 10 Sacred Beast Special Summons (Calamity of the Sacred Beasts, Infinity of the Sacred Beasts, Inferno of the Sacred Beasts) into Extra Deck boss monsters such as The Chaotic Phantasmal Sacred Beasts, Gustav Rocket and Yomagna; Link and Fusion boards (Accesscode Talker, Mediclius, Thunder Dragon Colossus) backed by Ars Magna and Power Patron support
• Turn 1 (going first): Open a Sacred Beast Level 10 starter or Summoner of the Sacred Beasts, search via Sacred Beasts Released or Card of the Soul, then Special Summon a Level 10 boss from hand
• Turn 2 (going second): Use hand traps (Ash Blossom, Ghost Ogre, Droll and Lock Bird, Nibiru) to break the opponent's first summon, then rebuild a Sacred Beast boss line from the Deck
• Recovery: Recursion through Sacred Beasts Released from the GY, Martyr of the Sacred Beasts and the Phantasm Spell/Trap pieces (Fallen Paradise, Abyss) to repeat Level 10 summons
• After siding: Not assessable: the deck has no Side Deck, so there is no post-side plan

Why it scores here

The list is illegal: Ash Blossom & Joyous Spring is run three times against a two-copy Semi-Limited limit, and the Extra Deck holds 20 cards against a 15-card cap. Under the rubric, that caps the deck at a low theoretical score and the normal Final formula does not apply. Structurally, the deck reliably opens a Sacred Beast Level 10 starter (about 70% for at least one of the 11-card archetype core in a 5-card hand, and about 98% for at least one searcher-text card), so its engine is easy to find. Its boss-level Extra Deck threats and the 8 hand traps and negations give it real closing and end-board strength. The score does not come from Phantasm Spiral being a popular archetype, and it is not an average of card scores; no combo boards, tournament share, or win-rate data exist, so the floor, median and ceiling are text-only inferences. The score is capped low because the list is illegal, not because of its structural quality.

Dimension scores

How the score was computed

Strategy profile: Combo primary, Midrange secondary (blend not computed; the Combo profile was used for the structural score). Structural ≈ 49, Going First ≈ 45, Going Second ≈ 50, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-6); extra_deck_size (-4). Final formula: Illegal list: capped at 25 (theoretical/structural-only). Normal formula 0.80*Structural + 0.20*TournamentReliability + modifiers = 0.80*49 + 0.20*40 - 10 = 37, not applied because the deck is illegal. Meta Power provisional/null.

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.7 · key two-card combo ≈ — · full-brick estimate ≈ 0.3 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Searchers and Level 10 summon enablers give a high chance of finding a starter in hand
• Boss Extra Deck monsters at 4000 to 5000 ATK and multiple negation and hand-trap layers
• Recursion through Sacred Beasts Released and Martyr gives some redundancy

Weaknesses

• Illegal list: copy limit and Extra Deck size both fail
• Sacred Beast engine is spread across sub-archetypes with 0% exact archetype purity
• No Side Deck and no post-side plan
• No combo, tournament or win-rate data to confirm the engine converts

Critical choke points

• Level 10 Sacred Beast summon: most lines need one of 3 to 4 Level 10 monsters in hand
• Ash Blossom over the Semi-Limited limit must be cut before the deck is playable

Recommended changes

Evidence & confidence

• Verified: Main Deck 53 cards, Extra Deck 20, Side 0; Ash Blossom & Joyous Spring at 3 copies against a Semi-Limited limit of 2; Extra Deck count of 20 exceeds the 15 maximum; Limited-status cards each run one copy
• Inferred: Starter accessibility from hypergeometric estimates (about 0.70 for the archetype core); Interaction density from card text (8 hand traps, 8 negations); Combo ceiling and floor from card text alone
• Provisional: Meta and format fit (no dated metagame sample); Tournament reliability
• Data gaps: No combos supplied, so floor, median and ceiling are text-only inference No tournament link, so archetype meta-share and pilot record are absent No win-rate telemetry (going-first/second, matchup, brick and starter rates) Meta Power is provisional without a dated metagame sample No Side Deck in the list, so post-side scores are not assessable