① You can tribute 1 monster; Special Summon 1 "Frog" monster from your Deck.
② "Frog" monsters can't be destroyed by battle.
● 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.