WATER
1Sinister Serpent
ATK:
300
DEF:
250
View:
5990
During your Standby Phase, if this card is in your GY: You can add it to your hand, also banish 1 "Sinister Serpent" from your GY during your opponent's next End Phase. You can only use this effect of "Sinister Serpent" once per turn.
Sinister Serpent — Power Evaluation
Final Score: 54 ± 7 · Confidence: Medium
- Intrinsic: 52 · Deck: 56 · Meta: provisional
- Primary role: Recovery/Recursion · Secondary: Utility, Material body
Why it scores here
Sinister Serpent converts into one thing reliably: a recurring discard / cost-fodder resource that returns itself from the Graveyard in the Standby Phase. It is a fully generic, archetype-less 1-of that slots almost anywhere, appearing in 376 sampled decks across 54 labelled archetypes, which is why its accessibility and deckbuilding scores are respectable. What keeps it out of the top tiers is that it builds no board and provides zero interaction on its own — combo evidence is entirely absent (0 appearances) and its 300 ATK/250 DEF earn nothing. Its recursion is also capped by the errata's banishing clause and by a hard Limited-to-1 slot, so the value is real but modest.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 58 | Limited to 1 in the Goat pool and drawn as a 1-of (374 of 376 decks run exactly 1 copy), though Sangan co-occurs in 91.2% of decks and can search it (observed). |
| Combo & Conversion | 22 | Builds no board on its own: combo data shows 0 appearances with no starter role/material role/payoff role usage, so conversion is limited to feeding costs (observed). |
| Resource Economy | 55 | During your Standby Phase it adds itself from the GY to the hand, repeatedly turning discard costs into reusable fuel, but the clause banishing 1 'Sinister Serpent' during the opponent's next End Phase caps the loop (verified). |
| Effect & Interaction | 10 | The card provides no removal, negation, or disruption of any kind; it only supplies fodder for the interactivity of other cards (verified). |
| Material Utility | 42 | A Level 1 WATER Reptile that is a clean generic body or discard target, but its 300 ATK / 250 DEF give it no combat or boss presence (verified). |
| Resilience & Flexibility | 50 | Self-recursion makes it useful across multiple turns and it survives as a resource once discarded, but the once-per-turn wording and the banish clause limit how far that stretches (verified). |
| Deck-Building Efficiency | 70 | A near free-roll, archetype-agnostic 1-of that appears across 54 distinct archetypes, though it occupies a hard Limited-to-1 slot rather than a redundant copy (observed). |
Calculation
Weight profile: 0.7 Recovery/Recursion + 0.3 average(Utility, Material body). Intrinsic ≈ 52, Deck ≈ 56, Meta = provisional. Modifiers: Limited to 1 (Goat format) (-3); Exceptional splashability (2). Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Recurs itself from the Graveyard each Standby Phase, providing reusable discard / cost fodder
- Fully generic, archetype-less text that slots into almost any deck
- Cheap 1-of investment (1.01 avg copies) with no extra engine required
- Searchable via Sangan (co-deck 91.2%), giving a real access route
Weaknesses
- No board presence or interaction on its own — builds nothing and disrupts nothing
- 300 ATK / 250 DEF means it wins no combats and is not a material threat
- Only 1 legal copy in the Goat pool, so top-deck access is low-redundancy
- Errata banishing clause caps the recursion loop instead of allowing infinite reuse
Counters / choke points
- Graveyard-hate such as D.D. Crow or Macro Cosmos / Dimensional Fissure stops the Standby Phase recursion
- Necrovalley prevents the Graveyard-to-hand recovery
- Removing it from the Graveyard before your Standby Phase denies the recycle
Best use
Recurring discard fodder / Level 1 body. Decks: Goat format control decks, Black Luster Soldier, Gravekeeper's, Monarch. Suggested copies: 1.
Evidence & gaps
- Verified: During your Standby Phase, if this card is in your GY, you can add it to your hand, also banishing 1 'Sinister Serpent' from your GY during your opponent's next End Phase.; The effect of 'Sinister Serpent' can only be used once per turn.; Level 1 WATER Reptile Effect Monster with 300 ATK / 250 DEF.; legal copies: goat = 1.
- Observed: 376 sampled decks run it, all in the main deck, averaging 1.01 copies with 374 decks at exactly 1.; It appears across 54 distinct labelled archetypes, led by Black Luster Soldier (15.2%), Relinquished (9.8%) and Thunder Dragon (9%).; Sangan co-occurs in 91.2% of its decks; Pot of Greed and Graceful Charity in 95.7%.; combo data records 0 appearances with 0% starter role, searched-for role, material role, payoff role or end-board.; usage statistics show 100% inclusion at 1 copy in Gravekeeper's, Monarch, Ninja and Nephthys samples.
- Inferred: Because it is a Level 1 body with low ATK, Sangan's <1500 ATK search qualifies it as a searchable target.; Its practical value is as reusable discard / cost fodder for cost-paying cards rather than as a standalone threat.; Graveyard-hate effects would prevent the Standby Phase recursion.
- Data gaps: no combos supplied — combo conversion is text-only inference no guides supplied no dated metagame sample, so meta power is left null/provisional deck sample is heavily concentrated in one era/format, so archetype spread may overstate portability