Spell Proof Armor
Skill - Keith
Market price · TCGPlayer
Updated Sep 14, 2026
$1.15 – $1.43
2 printings priced
Type
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.
Appears in 2 expansions
Printings (2)
| expansion | Code | Rarity | Price | Buy |
|---|---|---|---|---|
| Speed Duel: Scars of Battle | SBSC-ENS02 | Super Rare | $1.15 | |
| Speed Duel: Tournament Pack 4 | STP4-ENS03 | Common | $1.43 |
YuScan · iOS
What is your collection worth?
YuScan identifies any Yu-Gi-Oh! card with your camera and tracks live prices per printing across five marketplaces — so a 1st Edition never gets averaged with an Unlimited.
