REDU format ruling
Spell Gear

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Send 3 "Ancient Gear" cards you control to the Graveyard. You can Special Summon up to 1 "Ancient Gear Golem" from your hand and 1 from your Deck, ignoring the Summoning conditions. Then, destroy all monsters you control except "Ancient Gear Golems". You cannot Normal Summon or Set until the end of your next turn.
Rulings
- 'Ancient Gear' cards means any card you control that has Ancient Gear in its card name.
- You cannot activate Spell Gear if you do not have any Ancient Gear Golem remaining in your Deck.
- If an effect is chained that prevents you from Special Summoning Ancient Gear Golem, you still cannot Normal Summon or Set until the end of your next turn.
- The effect that prohibits Normal Summons or Sets until the end of your next turn is not a restriction on this card’s activation. So you can activate this card if you Normal Summoned earlier in the turn. But you cannot Normal Summon or Set after it is activated.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.