Edison format ruling
Ocean Dragon Lord - Neo-Daedalus
Card text as printed in this era© Can't be Normal Summoned/Set.
© Must be Special Summoned (from your hand) by tributing 1 "Levia-Dragon - Daedalus".
① You can send 1 face-up "Umi" you control to the GY;
send all cards in each player's hand and field to the GY, except this card.
Rulings
- The only way you can Special Summon this card is via its own procedure. Even if it was initially summoned that way, you still can't summon it with card effects.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.