![Spell Proof Armor [STP4-ENS03] Common](http://mediareload.net/cdn/shop/products/ygo_placeholder_f469c864-4ba3-4171-90f7-e2c8f1395d62_1024x1024.png?v=1709102852)
![Spell Proof Armor [STP4-ENS03] Common](http://mediareload.net/cdn/shop/products/ygo_placeholder_f469c864-4ba3-4171-90f7-e2c8f1395d62_480x480.png?v=1709102852)
| Set: | Speed Duel: Tournament Pack 4 |
| Card type: | Skill Card |
| Rarity: | Common |
Activate this Skill during your Main Phase and apply the following:
• Machine Normal Monsters you control are unaffected by your opponent's Spell Cards or effects.
• While you control no monsters, you can Normal Summon Machine Normal Monsters with 1 less Tribute.
• If you have a non-Machine monster on your field or GY, flip this card over. This Skill can only be used once per Duel.