Trap
NormalSplit Mirror of the Underworld
View:
2021
When you take damage from your opponent's card effect or their monster's attack: Apply the appropriate effect based on the type of damage. ● Battle: Special Summon 1 monster from your GY, with ATK less than or equal to the damage, and if you do, end the Battle Phase after the Damage Step. ● Effect: Inflict double the damage you took to your opponent. You can only activate 1 "Split Mirror of the Underworld" per turn.
Split Mirror of the Underworld — Power Evaluation
Final Score: 50 ± 8 · Confidence: Medium
- Intrinsic: 50.7 · Deck: 49.2 · Meta: provisional
- Primary role: Recovery / Recursion · Secondary: Utility
Why it scores here
Split Mirror is a reactive normal trap that only converts when the opponent damages you. Its value is either a free Special Summon of a monster with ATK at or below the damage taken from your graveyard (ending the Battle Phase), or a burn for double the damage taken. The 49-deck sample (1.61 copies per deck, 24 archetypes) confirms it is a practical, portable staple, but that frequency is not counted as power. Without combo data, the conversion score rests on the card text alone.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 50 | A set trap that needs the opponent to damage you before it does anything; 49 of 400 sampled decks run it, so it is reliably available in practice (observed, inferred for the trigger condition). |
| Combo & Conversion | 40 | No combo boards were recorded, so the conversion of the GY summon or the double-damage burn into a full board is text-only inference (inferred). |
| Resource Economy | 55 | The battle branch is a free GY Special Summon, a net gain of one body for one trap; the effect branch is damage, not card advantage (verified text, inferred value). |
| Effect & Interaction | 30 | No negation or removal; the damage reflection is punitive rather than a true interaction, and the trap is open to negation (verified text, inferred). |
| Material Utility | 15 | It is not a monster and provides no material, so its only material value comes indirectly through the monster it revives (verified text, inferred). |
| Resilience & Flexibility | 35 | A once-per-turn trap that dies to a single negation and needs the opponent to damage you, though it can stay set across turns (verified text, inferred). |
| Deck-Building Efficiency | 80 | Normal trap with no garnet, lock, or self-restriction, and a 1.61 average copy count across 24 archetypes shows it slots in cheaply (observed, verified text). |
Calculation
Weight profile: 0.7 Recovery/Recursion + 0.3 Utility. Intrinsic ≈ 50.7, Deck ≈ 49.2, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Free GY Special Summon when the battle branch triggers, giving card advantage without a cost
- Double-damage burn option that turns the opponent's damage into your win condition
- Played across 24 archetypes at about 1.6 copies, with no garnet or self-lock restriction
- Legal in both TCG and OCG
Weaknesses
- Dead unless the opponent actually damages you first
- The battle branch is capped at a monster with ATK at or below the damage taken
- Negatable as a set trap, which ends its value
- No recorded combo boards to confirm how often it converts
Counters / choke points
- Opponent avoids dealing damage to you, which stops the trigger entirely
- Opponent negates the trap while it is set
Best use
Reactive utility trap. Decks: Branded, Mikanko, Exosister. Suggested copies: 1.
Evidence & gaps
- Verified: Trigger: taking damage from an opponent's card effect or monster attack; Battle branch: Special Summon 1 monster from GY with ATK at or below the damage, then end the Battle Phase after the Damage Step; Effect branch: inflict double the damage taken to the opponent; Once per turn by name; Normal Trap; legal in TCG and OCG
- Observed: Present in 49 sampled decks, 1.61 average copies, 63.3% in gameplay type 7 and 32.7% in type 6; Appears across 24 distinct archetypes; Top partners: Infinite Impermanence (30.6%), Harpie's Feather Duster (28.6%), Ash Blossom & Joyous Spring (28.6%)
- Inferred: The battle branch's value depends on the damage size and the GY monster's ATK; Its interaction value is mostly deterrence, since it does not stop plays directly
- 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) — archetype inclusion % inferred from deck sample only no top_card_context supplied — popularity not used