DARK
7Cosmo Brain
ATK:
1500
DEF:
2450
View:
3609
Cannot be Normal Summoned/Set. Must first be Special Summoned by sending 1 non-Effect Monster from your hand or face-up field to the GY. This card gains ATK equal to the Level of the monster sent to the GY this way x 200. You can Tribute 1 Effect Monster; Special Summon 1 Normal Monster from your hand or Deck. You can only use this effect of "Cosmo Brain" once per turn.
Cosmo Brain — Power Evaluation
Final Score: 42 ± 8 · Confidence: Medium
- Intrinsic: 41 · Deck: 42 · Meta: provisional
- Primary role: Boss / End-board · Secondary: Material body
Why it scores here
Cosmo Brain is a 1500-ATK Level 7 Dark body whose real output depends on a conditional Special Summon: it must send a non-Effect monster from hand or field to the GY, and its ATK then rises by that monster's Level x 200. Its second effect converts an Effect Monster on the field into a Normal Monster from the Deck, which is a conversion rather than a net gain in bodies. The score is held down by the absence of any combo evidence, the 1500 base ATK, and zero interaction; the high-looking ATK ceiling earns little on its own, and the 15-of-15 deck inclusion confirms only that the route is practical, not that the card is strong.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 45 | Live in hand only when a non-Effect monster is in hand or on the field to send, and it cannot be Normal Summoned; 15 of 15 sampled decks run it, so the route is practical (inferred from text, observed in decks). |
| Combo & Conversion | 45 | No recorded boards (combo data has 0 appearances), so conversion rests on text: a big body plus a Normal-monster tutor-to-field, but the tribute cost makes the net body count roughly even (inferred). |
| Resource Economy | 30 | The Special Summon cost sends a monster to the GY and the tribute effect trades one monster for one Normal monster, so card advantage is roughly neutral to negative (inferred from text). |
| Effect & Interaction | 5 | No negation, removal, or hand-trap effect on the card (verified from card text). |
| Material Utility | 45 | Level 7 Dark Spellcaster is a usable Xyz or Synchro material even when its effects are negated, but it is not a Tuner and 1500 ATK is a weak material body (verified from card text and role inference). |
| Resilience & Flexibility | 35 | One body with a single once-per-turn effect; a negation leaves a 1500/2450 vanilla body, and the Special Summon condition is lost once it is on the field (inferred from text). |
| Deck-Building Efficiency | 60 | One copy is usually enough (avg 1.13 per deck), it is not a garnet or lock, and the cost is a conditional hand requirement rather than a brick risk (observed in decks, inferred from text). |
Calculation
Weight profile: 0.7 Boss / End-board + 0.3 Material body. Intrinsic ≈ 41, Deck ≈ 42, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Level 7 Dark body that remains a material even when its effects are negated
- ATK rises by the sent monster's Level x 200 on Special Summon, so Normal-monster lines reach high ATK
- Can add a Normal monster from the Deck by tributing an Effect Monster, which keeps the Normal-monster engine going
- Runs in 15 of 15 sampled decks across 7 distinct archetypes, with Dark Magician as the top partner (observed)
Weaknesses
- Cannot be Normal Summoned or Set, so it needs a non-Effect monster in hand or on the field to send
- Base 1500 ATK is weak if the Special Summon condition is not met
- No recorded combo evidence, so its real board impact is unproven
- Effects are once per turn and the tribute costs a monster; a negation leaves a vanilla 1500 body
Counters / choke points
- Generic hand traps that negate the Special Summon (inferred)
- Effect negation of the field body, which removes the ATK gain and the Normal-monster effect (inferred)
Best use
Boss / End-board body that feeds a Normal-monster line via its tribute-to-Normal effect. Decks: Red-Eyes, Blue-Eyes, Dark Magician. Suggested copies: 1.
Evidence & gaps
- Verified: Card text: cannot be Normal Summoned or Set; Special Summon by sending a non-Effect monster; ATK gain = Level x 200; tribute-to-Normal effect once per turn; Attributes: Level 7, DARK, Spellcaster, ATK 1500, DEF 2450; Decks: 15 sampled, 15 running main, avg 1.13 copies, 7 distinct archetypes
- Observed: Red-Eyes in 6 of 15 decks; Blue-Eyes in 4 of 15; Dark Magician in 2 of 15; Dark Magician is the top partner at 60% co-occurrence
- Inferred: The Special Summon route is practical because it is run in 15 of 15 sampled decks; Net card advantage is roughly neutral to negative because of the tribute and send costs; Negation leaves a 1500/2450 vanilla body
- Data gaps: no combos supplied: combo conversion is text-only inference no banlist token: assumed 3 copies (unlimited) no usage statistics (StatisticsCard): inclusion inferred from a 15-deck sample only no guide coverage beyond one Blue-Eyes guide mention