Edison format ruling
Automatic Laser

Card effect (current official text)When your opponent Normal or Special Summons a monster(s) with 1000 or more ATK, reveal 1 "Iron Core of Koa'ki Meiru" in your hand to activate this card. Destroy that Summoned monster(s).
Rulings
When your opponent Normal or Special Summons a monster(s) with 1000 or more ATK, reveal 1 Iron Core of Koa'ki Meiru in your hand to activate this card. Destroy that Summoned monster(s).
- This card activates in the Summon response timing (like Trap Hole).
- "Automatic Laser" does not target.
- You can activate "Automatic Laser" when your opponent Summons multiple monsters, but only the monsters with 1000 or more ATK will be destroyed.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.