Edison format ruling
Megarock Dragon

Card text as printed in this era© Can't be Normal Summoned/Set.
© Must be Special Summoned (from your hand) by banishing any number of Rocks from your GY (min.1).
① The original ATK/DEF of this card is the number of Rocks banished for its Summon x700.
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.
- If this card's effects become negated, or if it is flipped face-down, its ATK becomes 0.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.