Edison format ruling
Morphtronic Mix-up

Card effect (current official text)If you control 2 or more face-up "Morphtronic" monsters, select 2 cards your opponent controls. Destroy 1 card of your opponent's choice from those 2.
Rulings
- "Morphtronic Mix-up" targets 2 cards at activation. Your opponent picks a card at resolution. If something happened during the chain to remove 1 of the 2 cards, the remaining card is automatically chosen.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.