REDU format ruling
Dark Lucius LV8

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)If this card was Special Summoned by the effect of "Dark Lucius LV6", banish your opponent's monsters destroyed by battle with this card, also negate their effects.
Rulings
- "Dark Lucius LV8" must be on the field in order to negate a monster’s effect and remove it from play. If "Dark Lucius LV8" is returned to the hand because of "Begone, Knave!", it does not negate effects or remove monsters from play.
- If "Dark Lucius LV8" destroys "D.D. Scout Plane", it will still be Special Summoned because you cannot negate the effect of a monster that is activated while removed from play.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.