Edison format ruling
Dragon's Gunfire
Card effect (current official text)If you control a Dragon monster: Activate 1 of these effects;
● Inflict 800 damage to your opponent.
● Target 1 monster with 800 or less DEF; destroy that target.
Rulings
- You select which of the two effects you will use when you activate this card, before the opponent decides if they want to chain or not. If you choose the second effect, you select a target monster at activation also.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.