What set is Master's Key from?

Master's Key is card #068/L-P from the Pokémon JP set L-P: Legends Promos, released September 1, 2009.

What type of card is Master's Key?

Master's Key is a Trainer card in the Pokémon JP trading card game.

Trainer

Draw a card. Then, flip a coin. If heads, shuffle Master's Key into your deck.

Track Master's Key in your collection

Monitor prices, manage inventory, and list on eBay — all in one place.