Frogkin Kidnapper — ruling 1

Paying {3} to get a ransomed card back is a special action. The card’s owner may pay that cost any time they have priority, and players can’t take actions in between the time the player announces their intent to pay and the time the card returns to the zone from which it came.

Frogkin Kidnapper — ruling 2

The exiled card’s owner may pay its ransom cost even if the permanent that ransomed it leaves the battlefield.

Frogkin Kidnapper — ruling 3

Pay no attention to any other card in this set using the word “ransom” when determining how Frogkin Kidnapper’s ability works.

Frogkin Kidnapper : règles, fonctionnement et interactions (MTG)

Frogkin Kidnapper is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

When Frogkin Kidnapper enters, target opponent reveals their hand. Choose a nonland card from it. Ransom that card. (Exile it. Its owner may pay at any time to return it to their hand.)

How it works : Frogkin Kidnapper

Original English text — Wizards of the Coast / Scryfall

#1November 12, 2019· Wizards of the Coast
Paying to get a ransomed card back is a special action. The card’s owner may pay that cost any time they have priority, and players can’t take actions in between the time the player announces their intent to pay and the time the card returns to the zone from which it came.
No other card is named in this ruling.
#2November 12, 2019· Wizards of the Coast
The exiled card’s owner may pay its ransom cost even if the permanent that ransomed it leaves the battlefield.
No other card is named in this ruling.
#3November 12, 2019· Wizards of the Coast
Pay no attention to any other card in this set using the word “ransom” when determining how Frogkin Kidnapper’s ability works.
No other card is named in this ruling.