Endless Decay
DARK 5

Endless Decay

  • ATK:
  • -1

  • DEF:
  • 0

  • View:
  • 2761




If you have 2000 LP or less, you can Special Summon this card (from your hand). If this card is Normal or Special Summoned: This card's ATK becomes half the opponent's LP.




 
 
AI Power Analysis
Boss/End-boardConfidence: MediumEvaluated Oct 9, 2026
41± 8/ 100
Power Score
Intrinsic 43
Deck 40

Endless Decay — Power Evaluation

Final Score: 41 ± 8 · Confidence: Medium

  • Intrinsic: 43 · Deck: 40 · Meta: provisional
  • Primary role: Boss/End-board · Secondary: Material body

Why it scores here

Endless Decay's power comes from one conversion: its ATK becomes half the opponent's LP, so a late-game opponent at high LP makes it a large body from a single card. Its base -1 ATK and 0 DEF earned nothing. The hand Special Summon is gated by the controller having 2000 LP or less, which lowers accessibility and deck flexibility. The card gives no card advantage, no interaction, and no recorded combo presence, so the score stays around the 40s.

Axis scores

Axis Score Evidence
Accessibility 40 Hand Special Summon requires you to have 2000 LP or less, and no searcher or starter route appears in the evidence (verified text; zero as_starter/as_searched data).
Combo & Conversion 60 Single-card body whose ATK scales to half the opponent's LP, a clear one-card-to-threat conversion from the text, but no combo boards were supplied to confirm it (verified text, inferred impact).
Resource Economy 15 No draw, search, recursion, or banish refuel; it is a one-for-one body with no card advantage (verified text).
Effect & Interaction 10 No negation, removal, or disruption on its own; only a board-state ATK change (verified text).
Material Utility 55 Level 5 DARK Zombie is a generic Level 5 material for Xyz/Synchro lines, and the ATK effect does not change its material value (verified card stats, inferred use).
Resilience & Flexibility 35 Its ATK depends on the opponent's LP and a single body with no multi-zone or multi-turn presence; a monster-effect negation would stop the ATK setting (inferred from text).
Deck-Building Efficiency 55 One copy per deck across 4 sampled decks with no garnet-style slot cost, but the LP≤2000 summon condition restricts how the deck can play (observed deck stats and verified text).

Calculation

Weight profile: Boss/End-board profile (primary role; no secondary blend applied). Intrinsic ≈ 43, Deck ≈ 40, Meta = provisional. Modifiers: Self-restriction: hand summon requires <=2000 LP (-3). Final formula: 0.40*Intrinsic + 0.60*Deck

Strengths

  • ATK scales to half the opponent's LP, so it becomes a large body late in the duel from one card
  • Level 5 DARK Zombie is a generic material for Level 5 Xyz/Synchro lines
  • Hand-summonable with no archetype requirement
  • Appears across three archetypes in the sample (Vampires, Zombies, Mayakashi Shiranui)

Weaknesses

  • Hand summon requires the controller to have 2000 LP or less
  • No searcher, extender, or draw route in the evidence
  • Zero card advantage and zero interaction
  • Its ATK is low when the opponent's LP is low
  • No combo or guide evidence to confirm the claimed conversion

Counters / choke points

  • A monster-effect negation stops the ATK-setting effect (inferred from text; no counter data in evidence)

Best use

Boss/End-board body that converts a late opponent LP total into ATK. Decks: Vampires, Zombies, Mayakashi Shiranui. Suggested copies: 1.

Evidence & gaps

  • Verified: Text: hand Special Summon if you have 2000 LP or less; Text: ATK becomes half the opponent's LP when Normal or Special Summoned; Stats: Level 5 DARK Zombie Effect Monster, base ATK -1 DEF 0; Decks: 4 sampled decks, each running 1 copy, across 3 archetypes
  • Observed: Partner frequency: Book of Life in 4/4 decks, Doomking Balerdroch and Ash Blossom in 3/4 decks; Gameplay mix: 3 decks in gameplay type 7, 1 in gameplay type 4
  • Inferred: Primary role is Boss/End-board because the ATK conversion makes it a late-game threat; Level 5 material fit is generic and should not change when the effect is negated; Monster-effect negation would stop the ATK setting
  • Data gaps: no combos supplied: combo conversion is text-only inference no guides supplied no banlist token: assumed 3 copies (unlimited) no usage statistics (StatisticsCard): inclusion % is unavailable and inferred from the 4-deck sample only sample size of 4 decks is too small for a strong deck-level claim











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