The following Planeswalkers are available from May 5th to May 11th:

• Nicol Bolas, Dragon-God.
• Liliana, Death's Majesty.
• Nahiri, Heir of the Ancients.
• Niko Aris.
• Nissa of Shadowed Boughs.
• Huatli, Warrior Poet.
• Kaya, Geist Hunter.
• Kaya, Orzhov Usurper.
• Liliana of the Veil.
• Lukka, Bound to Ruin.
• Kaito, Bane of Nightmares.

The following Planeswalkers are available from May 12th to May 18th:

• Nicol Bolas, Dragon-God.
• Lukka, Coppercoat Outcast.
• Tezzeret, Artifice Master.
• Urza, Lord Protector.
• Archangel Elspeth.
• Ajani Unyielding.
• Jace, Unraveler of Secrets.
• Kaito Shizuki.
• Nissa, Worldwaker.
• Ob Nixilis, Reignited.

Please visit back here often to get the latest information on the current available Planeswalkers. Given the increasing number of Planeswalkers and Card Sets in-game, we are starting to rotate Planeswalkers and Card Sets in and out of the Shop to put a larger focus on the newer sets and keep the game feeling fresh. But don’t worry, you’ll still be able to use any cards or Planeswalkers you currently have in your collection. You’ll also see all the older Planeswalkers and Card Sets returning to the Shop in the future, and you’ll be able to earn cards from older sets in-game. 

Thanks for playing Magic: Puzzle Quest!

P.S.: If you don't see one or more Planeswalkers available in this list in your Shop, it means you already own that Planeswalker. The game won't offer you the Planeswalker you already have, as there is no point in purchasing a second copy of it.