Card Rulings:4-Starred Ladybug of Doom
- The effect of "4-Starred Ladybug of Doom" is a Trigger Effect that activates on the field. (It does not target.)
- The effect always activates if "4-Starred Ladybug of Doom" is flipped face-up. (It activates even during the Damage Step. It activates even if there are no face-up Level 4 monsters in your opponent's Monster Zone, but since there is no monster to destroy, the effect resolution is not applied.)
- Destroy all face-up Level [sic] monsters in your opponent's Monster Zone when the effect resolves.
- Konami OCG Card Database: 4-Starred Ladybug of Doom