Edison format ruling
Mega Ton Magical Cannon
Card effect (current official text)Remove 10 Spell Counters on your side of the field. Destroy all cards on your opponent's side of the field.
Rulings
- Removing Spell Counters is a cost. If you do not have 10 Spell Counters you cannot activate Mega-Ton Magical Cannon.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.