REDU format ruling
Jain, Lightsworn Paladin

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)If this card attacks an opponent's monster, it gains 300 ATK during the Damage Step only. Once per turn, during your End Phase: Send the top 2 cards of your Deck to the Graveyard.
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.