Subterror Behemoth Umastryx
EARTH 7

Subterror Behemoth Umastryx

  • Archetype:
  • Subterror

  • ATK:
  • 2000

  • DEF:
  • 2700

  • View:
  • 3485




FLIP: You can target 1 monster your opponent controls; banish it. You can only use this effect of "Subterror Behemoth Umastryx" once per turn. When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You can change this card to face-down Defense Position.




 
 
AI Power Analysis
Removal / NegationConfidence: MediumEvaluated Oct 8, 2026
55± 6/ 100
Power Score
Intrinsic 54
Deck 56

Subterror Behemoth Umastryx — Power Evaluation

Final Score: 55 ± 6 · Confidence: Medium

  • Intrinsic: 54 · Deck: 56 · Meta: provisional
  • Primary role: Removal / Negation

Why it scores here

Umastryx earns its score from a once-per-turn FLIP effect that banishes one opponent monster, which is soft removal that needs a flip to activate. Its hand Special Summon and its once-per-turn return to face-down Defense give it some recovery after a flip, but the hand route is conditional on having no other face-up monsters. Its 2000 ATK and 2700 DEF earned no points, and the Level 7 body is only a modest material asset. The 395-deck sample and the Subterror partners confirm it is a real, consistently run piece of its archetype rather than a forgotten pick, but that frequency is not counted as power.

Axis scores

Axis Score Evidence
Accessibility 55 The card is in all 395 sampled decks and has a conditional hand Special Summon after a flip, but no combo starter or search data exists to confirm how live it is in opening hands (observed for deck presence, inferred for hand route).
Combo & Conversion 35 No recorded boards exist, so conversion rests on the text alone: one flip banish plus a body, with no evidence of a multi-card line (inferred from text).
Resource Economy 45 The FLIP banish is a one-for-one removal with no draw, search, or recursion beyond the hand revive, so the economy is roughly even (verified from text).
Effect & Interaction 55 The banish hits one opponent monster once per turn, but only as a flip effect, which makes it soft and timing-limited (verified from text, with timing limits inferred).
Material Utility 45 A Level 7 EARTH Reptile is a usable material body and keeps its 2000 ATK when its effect is negated, though it is not a clean generic fit (verified from card data, inferred for material fit).
Resilience & Flexibility 55 It can be flipped back to face-down Defense once per turn and re-Summoned from hand after a flip, which gives some reuse across turns, but one negate on the flip trigger ends the effect (inferred from text).
Deck-Building Efficiency 70 It is run as a single copy in 361 of 395 decks (avg 1.1 copies) with no garnet or lock restriction, so it is cheap to run (observed).

Calculation

Weight profile: Primary role Removal/Negation only; no secondary blend applied. Intrinsic ≈ 54, Deck ≈ 56, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck

Strengths

  • Once-per-turn FLIP banish answers one opponent monster (verified from text)
  • Present in all 395 sampled decks, mostly Subterror archetype lists (observed)
  • Hand Special Summon after a flip of a face-up monster, with no other face-up monsters (verified from text)
  • Run as a single copy in most decks, so it is cheap to include (observed)

Weaknesses

  • Removal only activates as a flip effect, so it is soft and timing-limited (inferred from text)
  • Hand Special Summon requires no other face-up monsters you control (verified from text)
  • 2000 ATK and 2700 DEF earn no points on their own (guardrail 1)
  • No recorded combo boards to show what it converts into (data gap)

Counters / choke points

  • Negating the FLIP effect activation, since the banish needs a flip to resolve (inferred, generic)

Best use

Flip-control removal with a hand revive after a flip. Decks: Subterror (archetype 711), Subterror (archetype 176), Subterror (archetype 113). Suggested copies: 1.

Evidence & gaps

  • Verified: FLIP: once-per-turn banish of 1 opponent monster (card text); Hand Special Summon in Defense Position when a face-up monster you control is flipped and you control no face-up monsters (card text); Once per turn: change to face-down Defense Position (card text); Level 7 EARTH Reptile, ATK 2000 / DEF 2700 (card data); Present in 395 of 395 sampled decks (deck data)
  • Observed: Single copy in 361 decks, avg 1.1 copies (deck data); Subterror partners appear in about 94% of decks (top partners); Guides describe the shared Behemoth flip and revive effects as expanding the board through Fiendess and Guru (guide data)
  • Inferred: Flip-only activation makes the banish timing-limited and easier to interact with; Hand revive is conditional, so it is not a reliable opening-hand line; Level 7 body is a usable but not clean generic material
  • Data gaps: no combos supplied: combo conversion is text-only inference no banlist token: assumed 3 copies (unlimited) legal copies is empty for all formats no usage statistics (StatisticsCard): archetype inclusion % inferred from deck sample only no rulings supplied for flip timing and hand revive interactions











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