EARTH
12Subterror Behemoth Ultramafus
Archetype:
Subterror
ATK:
3000
DEF:
1800
View:
3136
FLIP: You can change all other face-up monsters on the field to face-down Defense Position. You can only use this effect of "Subterror Behemoth Ultramafus" 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.
Subterror Behemoth Ultramafus — Power Evaluation
Final Score: 57 ± 6 · Confidence: Medium
- Intrinsic: 54 · Deck: 58 · Meta: provisional
- Primary role: Board breaker · Secondary: Starter
Why it scores here
The card's main value is the FLIP effect, which changes every other face-up monster on the field to face-down Defense Position, a board disruption effect that is limited to once per turn. Its hand Special Summon only works when a monster you control is flipped and you control no face-up monsters, so access is conditional. It is cheap to run, with 137 of 163 decks using one copy, and it is strongly tied to Subterror (84% co-occurrence with Subterror Guru and Subterror Fiendess). No combo data exists, so its conversion score rests on text alone. High ATK and DEF earned no points, and the card does not score on its Level 12 body.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 45 | The hand Special Summon needs a flipped face-up monster and an empty face-up field, and 163 decks running it show it is played, but there is no starter or searcher count (verified text; deck count observed). |
| Combo & Conversion | 50 | The mass flip to face-down DEF and the Behemoth flip-control line are described in the guide, but no combo boards record what it converts into (inferred from text and guide). |
| Resource Economy | 30 | The card draws nothing and gains no card advantage; its only repeatable effect is a self-flip to face-down DEF (verified text). |
| Effect & Interaction | 60 | The effect changes all other face-up monsters to face-down DEF in one activation, a broad board disruption that does not destroy or negate (verified text). |
| Material Utility | 25 | The Level 12 Pyro EARTH body has no recorded material use in the evidence and is a narrow fit for summoning (inferred). |
| Resilience & Flexibility | 55 | The card has two effects, a hand Special Summon and a once-per-turn self-flip, so it has more than one route, but both are conditional (verified text). |
| Deck-Building Efficiency | 80 | One copy is the norm (137 of 163 decks) and no garnet or banlist restriction is supplied, so the card is cheap to run (observed deck data; banlist assumed unlimited). |
Calculation
Weight profile: 0.7 Board breaker + 0.3 Starter. Intrinsic ≈ 54, Deck ≈ 58, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Mass flip to face-down DEF disrupts an opposing board in one activation (verified text)
- Once-per-turn self-flip gives repeatable board control (verified text)
- Conditional hand Special Summon adds a recovery route (verified text)
- Appears in 163 recent decks, co-occurring with Subterror Guru and Subterror Fiendess in 84% of them (observed)
Weaknesses
- The hand Special Summon needs a flipped face-up monster and an empty face-up field (verified text)
- No combo boards supplied, so starter and payoff roles are not confirmed (verified data gap)
- No card advantage; the effect is pure board control (verified text)
- Level 12 body is a narrow material fit (inferred)
Counters / choke points
- Opponent responses to the flip or the hand Special Summon, per standard chain logic (inferred; no counter data supplied)
Best use
Board breaker that flips the opposing field to DEF and recovers from hand when the field is clear. Decks: Subterror. Suggested copies: 1.
Evidence & gaps
- Verified: FLIP effect changes all other face-up monsters to face-down DEF, once per turn (card text); Hand Special Summon in DEF requires a flipped face-up monster and no other face-up monsters (card text); Once-per-turn self-flip to face-down DEF (card text)
- Observed: 163 recent decks run it, 137 with one copy (deck data); 84% co-occurrence with Subterror Guru and Subterror Fiendess (deck data)
- Inferred: Board breaker is the primary role and Starter the secondary role, from the text and the guide; Level 12 body is a narrow material fit
- Data gaps: no combos supplied; combo conversion is text-only inference no banlist token; assumed 3 copies (unlimited) no rulings supplied no dated metagame sample; Meta is null