Spell Proof Armor
Speed Duel Tournament Pack 4 (STP4) · #300103002 · Common · yugioh
Card: Skill - Keith
[Activate this Skill during your Main Phase.]
All Machine monsters you control are unaffected by your opponent's Spell effects. You can Normal Summon Machine Normal Monsters with 1 less Tribute. If a non-Machine monster is in your GY, flip this Skill over. This Skill can only be used once per Duel.
DeckSpec Pricei
$1.10
Condition
Weighted composite · smoothed against one-off swings.
Current prices
Condition
normalNM
| Cardmarket | ≈$1.23 | 2026-08-09 |
| coolstuffinc | $5.99 | 2026-08-09 |
| ebay | $3.49 | 2026-08-09 |
| TCGplayer | $1.03 | 2026-08-09 |
Non-USD sources (e.g. Cardmarket, EUR) are shown converted to USD at €1 ≈ $1.15 — indicative, not an exact quote.
Prices update daily · last checked Sun Aug 09. Indicative, not offers — how we price.
Price history (last 180 days)
Condition key
NM Near MintLP Lightly PlayedMP Moderately PlayedHP Heavily PlayedDMG Damaged
Recorded prices are Near Mint; LP–DMG are estimated from standard hobby multipliers (foils discounted more steeply) — a guide, not a market quote.
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Printed in 2 sets
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