Underdog

Underdog — Power Evaluation

Final Score: 49 ± 7 · Confidence: Medium

• Intrinsic: 50 · Deck: 48 · Meta: provisional
• Primary role: Floodgate / Control · Secondary: Negation/Interaction, Utility

Why it scores here

Underdog is a generic Continuous Trap whose only real asset is a cost-free, once-per-turn-free blanket negation of every face-up monster the opponent controls during your turn, which can strip an opposing board of its monster-based disruption while you push for game. Its ATK/DEF, rarity and view count earn nothing here; what caps the score is that it is a slow Trap (set, then wait a turn), that it inverts on the opponent's turn to negate your own face-up monsters, and that it produces no card advantage and no board of its own. Evidence shows only a thin, tech-level home (8 recent decks, 1.12 copies, 5 archetypes) with zero recorded combo appearances and zero guides, so it lands near the middle of the scale as a situational, archetype-agnostic control piece.

Axis scores

Calculation

Weight profile: 0.7 Floodgate/Control + 0.3 Negation/Interaction. Intrinsic ≈ 50, Deck ≈ 48, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck

Strengths

• During your turn it negates the effects of ALL face-up monsters the opponent controls with no cost, no target and no once-per-turn limit, a fully one-sided blanket negation.
• Fully generic: no archetype requirement, no Type/Attribute lock, splashable into any deck that can afford a Trap slot.
• Continuous Trap that keeps negating on every one of your turns for as long as it stays face-up, so one card can cover multiple push turns.
• Shuts off opponent's on-field monster-based protection and negation while you build or attack.

Weaknesses

• Slow: it is a Trap that must be Set and then waited on, so it cannot rescue a going-second turn 2.
• Symmetric drawback: during the opponent's turn it negates the effects of YOUR face-up monsters, turning off your own board's monster-based interruption.
• Only negates face-up monsters, so hand traps, GY effects and Set/non-monster interaction are unaffected.
• Produces no card advantage, no board development and nothing from the GY — a pure defensive/offensive-enabling slot.
• Easy to remove with generic Spell/Trap removal; one hit removes the whole effect.

Counters / choke points

• Mystical Space Typhoon / Cosmic Cyclone / Twin Twisters / Harpie's Feather Duster (Spell/Trap removal)
• Royal Decree / Jinzo (Trap effect negation)
• Red Reboot / Solemn Judgment (Trap activation negation)
• Hand traps and GY-activated monster effects, which the card cannot negate
• Denko Sekka / anti-Set effects that prevent it from ever being placed or flipped

Best use

Turn-based blanket monster-effect negation used as a push-turn control/tech card. Decks: Blackwings, Harpie / Mist Valley / Dark Simorgh WIND-DARK shell, Meklord, Qliphort, Melodious, Chaos Phantom. Suggested copies: 1.

Evidence & gaps

• Verified: Card text: during your turn negate the effects of all face-up monsters your opponent controls; during your opponent's turn negate the effects of all face-up monsters you control.; Card type is Continuous Trap with no archetype, no ATK/DEF, no Level, and no Link rating.; Legal in TCG, OCG and Master Duel; no banlist token supplied, so assumed unlimited (3 copies).; No cost, no target and no once-per-turn clause appear in the card text.
• Observed: 8 recent decks run it, all in the Main Deck, average 1.12 copies (7 decks at 1 copy, 1 deck at 2).; Spread across 5 archetypes: Blackwings 50%, Chaos Phantom 12.5%, Melodious 12.5%, Meklord 12.5%, Qliphort 12.5%.; Top co-deck partners form a WIND/DARK shell: Earthbound Immortal Aslla piscu, Dark Simorgh, Mist Valley Apex Avian, Harpie and Blackwing pieces (all 50% co-deck rate).; Combos evidence: 0 appearances across 0 tracked combo boards; 0 guides supplied; no StatisticsCard usage rows.
• Inferred: The card functions as a one-sided push-turn enabler, cancelling opponent's face-up monster effects while you combo or attack.; Because it inverts on the opponent's turn, it only fits decks whose defensive line does not depend on their own face-up monster effects.; No searcher or summon route for it is evidenced, so accessibility is limited to drawing it.; Its low average copy count (1.12) is consistent with a tech/sidegrade slot rather than a core engine piece.
• 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 the 8-deck sample only no side-deck vs main-deck split beyond the sample (all 8 entries are main deck) no data on which turn the card is typically activated or flipped, so resilience/timing is partly inferred