Speedroid Skull Marbles

Speedroid Skull Marbles — Power Evaluation

Final Score: 40 ± 6 · Confidence: Medium

• Intrinsic: 45.8 · Deck: 46.3 · Meta: provisional
• Primary role: Material body · Secondary: Utility

Why it scores here

Speedroid Skull Marbles converts into a free Level 7 body and a 3000-DEF wall, but only during the Standby Phase and only if the opponent already controls a face-up Extra Deck monster, so it is effectively never live when going first and only while the field stays "Speedroid"-only. It adds no search, no negation, no removal and no card advantage, and its self-destruct clause actively conflicts with the non-"Speedroid" Extra Deck bosses its own deck plays (Baronne de Fleur 69.2% co-deck, Clear Wing Synchro Dragon 65.4%). Its 3000 DEF and battle-damage redirection earn essentially no points here - the score is driven by conditional access, near-zero interaction, and a deck-building constraint. Recorded evidence is thin (26 decks, 1.35 copies average, zero combo appearances), so the final score sits in the low 40s.

Axis scores

Calculation

Weight profile: 0.7 Material body + 0.3 Utility. Intrinsic ≈ 45.8, Deck ≈ 46.3, Meta = provisional. Modifiers: Self-locking archetype restriction (-4); Dead on the first turn (-2). Final formula: 0.40*Intrinsic + 0.60*Deck

Strengths

• Free Special Summon from hand with no cost, LP payment or discard, once per turn.
• 3000 DEF body that cannot be destroyed by battle with a Normal Summoned/Set monster and redirects the battle damage you would take to the opponent.
• Inside a near-pure Speedroid build the "Speedroid"-only clause is easy to satisfy, so it functions as a Level 7 body and Synchro/Xyz material.
• Only a 1-2 slot investment and it is a "Speedroid" monster, so archetype search support can reach it.

Weaknesses

• Cannot be Special Summoned going first, so it is a dead card in the opening hand in that scenario.
• Self-destructs whenever you control a face-up non-"Speedroid" monster, which conflicts with the deck's own non-Speedroid Extra Deck bosses (Baronne de Fleur, Clear Wing Synchro Dragon).
• 0 ATK, no removal, no negation, no card advantage - it contributes no disruption whatsoever.
• Played at only 1.35 copies on average, with 17 of 26 decks running exactly one, marking it as a flex slot rather than an engine piece.

Counters / choke points

• Any effect negation or blanket Special Summon negation (e.g. Solemn Strike) stops the hand Special Summon.
• Generic removal (destroy/banish/bounce) on the summoned body leaves you down a card for nothing.
• Building a board without face-up Extra Deck monsters turns off the summon condition entirely.
• Its own archetype lock: keeping any non-"Speedroid" monster on your field destroys it.

Best use

Flexible Level 7 defensive body / Synchro material in a near-pure Speedroid build. Decks: Speedroid. Suggested copies: 1.

Evidence & gaps

• Verified: Text: once per turn, during the Standby Phase, if the opponent controls a face-up monster Special Summoned from the Extra Deck, you can Special Summon this card from your hand.; Text: it cannot be destroyed by battle with a Normal Summoned/Set monster, and the opponent takes the battle damage you would have taken from battles involving it.; Text: if you control a face-up monster that is not a "Speedroid" monster, destroy this card.; Printed stats/typing: Level 7, WIND, Machine, 0 ATK / 3000 DEF, "Speedroid" name, legal in TCG/OCG/MasterDuel/DuelLinks.; 26 decks run it (26 main deck, 0 side), average 1.35 copies, max 2 (17 lists at 1 copy, 9 at 2).; Top partners: Speedroid Terrortop / Taketomborg / CarTurbo at 88.5%, Den-Den Daiko Duke / Fuki-Modoshi Piper / Clear Wing Fast Dragon at 84.6%.
• Observed: 78% of the sample decks are Speedroid (42.3% + 19.2% + 15.4% across three archetype IDs); Kashtira appears in 7.7%.; Copies-per-deck distribution is dominated by singletons (17 of 26 decks run 1), indicating a flex/tech slot rather than a core engine piece.; Baronne de Fleur is present in 69.2% and Clear Wing Synchro Dragon in 65.4% of the same decks - both non-"Speedroid" bosses.; combos_evidence records 0 appearances, 0 as_starter, 0 as_material, 0 as_payoff and no average power index.; No usage_statistics rows and no guide mentions exist for this card.
• Inferred: Because the self-destruct check is a continuous condition on your own field, any non-"Speedroid" face-up monster (Baronne de Fleur, Clear Wing Synchro Dragon) would immediately destroy this card - an anti-synergy with the deck's own end board.; The Standby Phase timing plus the requirement that the opponent already control an Extra Deck monster means the card is only functional in going-second games.; As a Level 7 body it can serve as Synchro material (e.g. with a Level 3 "Speedroid" Tuner toward a Level 10), but only while the rest of your board stays Speedroid.; Speedroid search support in the same lists (Speedroid Scratch in 61.5% of decks) plausibly provides a route to find this "Speedroid" monster.
• 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 dated metagame sample, so meta_power is left null and the score is provisional deck sample is small (26 decks) and Speedroid archetype IDs are split across three rows, so true inclusion rate is only approximate