Tengu format ruling
Dupe Frog
Card effect (current official text)This card's name becomes "Des Frog" while it is on the field. Monsters your opponent controls cannot target monsters for attacks, except this one. When this card is sent from the field to the Graveyard: You can add 1 "Frog" monster from your Deck or Graveyard to your hand, except "Dupe Frog".
Rulings
- If you control 2 or more "Dupe Frog", your opponent can't attack any monsters (however, this doesn't prevent them from attacking directly with cards like "Drill Warrior").
- If this card is tributed for the effect of "Substitoad", it will miss its timing. You can read more about Timing here: https://www.mikamika.de/edison-rules
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.