Edison format ruling
Gragonith, Lightsworn Dragon

Card text as printed in this era① Gains 300 ATK and DEF for each "Lightsworn" monster in your GY with a different name.
② Inflicts Piercing Damage.
③ During your End Phase: Send the top 3 cards of your Deck to the GY.
(Activate & Resolve only if this card is face-up on the field).
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 Edison forum — sourced change requests get reviewed.