Edison format ruling
Substitoad
Card text as printed in this era① You can tribute 1 monster; Special Summon 1 "Frog" monster from your Deck.
② "Frog" monsters can't be destroyed by battle.
Rulings
- Like all ignition effects, this card's effect can be activated whenever you summon a monster. When you summon Substitoad, you can activate its effect using your ignition priority. When the "frog" monster is summoned, Substitoad's effect can be activated again, using your ignition priority.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.