REDU format ruling
Lyla, Lightsworn Sorceress

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)You can target 1 Spell/Trap your opponent controls; this card's battle position cannot be changed until the end of your next turn, also change this card you control from face-up Attack Position to face-up Defense Position, and if you do, destroy that target. Once per turn, during your End Phase: Send the top 3 cards of your Deck to the GY.
Rulings
- If you control multiple "Lightsworn" monsters, their End Phase effects don’t chain to each other (they each activate, one after another).
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.