Spell
FieldEarthbound Prison
Archetype:
Earthbound
View:
2839
When this card is activated: You can target 1 Effect Monster your opponent controls; this card gains this effect. ● While this card is in the Field Zone, negate the effects of that face-up Effect Monster while it is on the field. During your Main Phase, you can Normal Summon 1 "Earthbound" monster in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) If this card in your possession is destroyed by an opponent's card effect, and you have an "Earthbound" monster in your field or GY: Halve your opponent's LP, and if you do, negate the effects of all face-up cards your opponent currently controls, until the end of this turn.
Earthbound Prison — Power Evaluation
Final Score: 62 ± 8 · Confidence: Medium
- Intrinsic: 60 · Deck: 63 · Meta: provisional
- Primary role: Negation/Interaction · Secondary: Extender
Why it scores here
Earthbound Prison's score comes from its effect_interaction: it negates one targeted opposing Effect Monster for as long as it stays in the Field Zone, and its destruction clause halves the opponent's LP and negates all of their face-up cards for the turn. It also gives an extra Normal Summon of an Earthbound monster, and it is easy to run (1 copy typical, 80% inclusion in its main archetype). The 400-deck sample shows it is consistently played, but that frequency is not used as a power driver. Its high deck presence does not raise the score beyond what the text and synergy support, and no combo data exists to confirm its conversion.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 72 | Live in 400/400 decks with 36% Earthbound and 13% second-Earthbound inclusion, but no searcher or combo-start data is supplied to confirm the route (observed) |
| Combo & Conversion | 40 | Text gives an extra Normal Summon and a negation, but no recorded boards show what it builds from a real start (inferred) |
| Resource Economy | 35 | No refuel or draw in the text; only the LP-halving destruction clause provides any return, and it needs an opponent's effect to destroy it (verified) |
| Effect & Interaction | 75 | Negates a targeted monster's effects while on the field and, on destruction, negates all opponent face-up cards for the turn (verified) |
| Material Utility | 10 | A Spell card, so it cannot serve as material and gives no body value (verified) |
| Resilience & Flexibility | 50 | Field-spell placement is fragile, but the destruction clause gives some recovery value; no rulings or interaction data are supplied (inferred) |
| Deck-Building Efficiency | 78 | Typically 1 copy, unlimited format legality, no garnet or lock restriction, and 80% inclusion in its archetype (observed) |
Calculation
Weight profile: 0.7 Negation/Interaction + 0.3 Extender. Intrinsic ≈ 60, Deck ≈ 63, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Targeted monster negation while on the field
- Destruction clause gives LP halving plus a turn-long negation of all opponent face-up cards
- Extra Normal Summon of an Earthbound monster, once per turn
- Low deck cost: typically 1 copy, unlimited legality
Weaknesses
- Negation applies only to one targeted monster while it stays on the field
- Destruction clause needs the card destroyed by an opponent's effect and an Earthbound monster in field or GY
- No refuel or card advantage
Counters / choke points
- Removal or destruction of the Field Zone card (no combo data supplied for specific answers)
Best use
Negation/Interaction with an extra Normal Summon for Earthbound. Decks: Earthbound, Earthbound (secondary archetype), Archfiend, Resonator. Suggested copies: 1.
Evidence & gaps
- Verified: Card text: targeted monster negation while on the field; destruction clause halves LP and negates all opponent face-up cards; Formats: TCG and OCG; no banlist token supplied, assumed 3 copies
- Observed: In 400 decks, 36.2% and 12.8% in the two Earthbound archetypes; Top partners co-occur in 94–96% of decks; Usage statistics show 80% inclusion, 1 typical copy, in Earthbound (1408)
- Inferred: The extra Normal Summon is an extender effect; Destruction clause needs an opponent's effect and an Earthbound monster, so reliability depends on the board state
- Data gaps: no combos supplied — combo conversion is text-only inference no guides supplied no banlist token — assumed 3 copies (unlimited) no rulings supplied for the 'gains this effect' and destruction-trigger interactions