We're aware of this issue and are looking into it. Some people have had success with just waiting a bit, and then trying again. Sorry for the inconvenience! We'll keep everyone updated.

https://magicthegatheringarena.statuspage.io/incid...

In order to use the "PlayWarSpark" code, you will need to download and install the latest update (APR 25 - 0.14.00.00). You will not receive your packs if you do not have the War of the Spark game update!

If you attempted to redeem the code prior to updating to 0.14.00.00, you will need to contact customer support to receive your packs.

8-card boosters from the store are not guaranteed to have a planeswalker - they're just distributed by rarity in those. The boosters used in draft and sealed each have a planeswalker, similar to printed boosters.

War of the Spark

• All 264 cards from War of the Spark are now available in Magic: The Gathering Arena. This includes the buy-a-box promo as well as cards in the Jace and Gideon planeswalker decks.
• Redeem the code "PlayWarSpark" for three War of the Spark booster packs in-game!
  • IMPORTANT NOTE: Please be sure to download the update before you try to redeem the code!
  • MTG Arena Boosters (8-cards) are NOT guaranteed to have a planeswalker.
  • MTG Arena Limited Boosters (14-cards in Draft/Sealed events) WILL each have a planeswalker.
  ...

Set Features and Keywords

New Battlefield

The stakes have never been higher as you battle your opponents on top of Bolas’s Citadel during the epic finale of the War of the Spark.

Planeswalkers

War of the Spark features dozens of planeswalkers, effectively doubling the number of planeswalkers available in Magic the Gathering: Arena. Unlike our previous planeswalkers these each have a non-loyalty ability in addition to their loyalty abilities. Make sure you examine your opponent’s planeswalkers to see how they can interact with the game outside of using their loyalty.

• Remember that loyalty on planeswalkers is tracked using counters, so it will interact with mechanics like Proliferate or cards that manipulate counters like Soul Diviner or Price of Betrayal
• When a planeswalker has used all their loyalty activations for the turn their loyalty box will grey out.
• When planeswalkers that partially hidden by the stack are r...

War of the Spark Prerelease Code FAQ

Play in a War of the Spark prerelease at a local Wizards Play Network store and receive a code inside your prerelease pack that redeems for a Traditional Draft event entry on MTG Arena!

Additional Info

• War of the Spark Traditional Draft will be available starting April 29th, 2019 at 8AM PT (15:00 UTC).
• The code is located at the front of the Prelease pack, on the Token card next to the Rules insert.
• The code text references "Competitive Draft" due to naming conventions no longer in use. The updated in-game event name is Traditional Draft.
• Codes will be available for redemption in-game starting on April 25th, 2019 at Midnight UTC. If you attempt to redeem a code from a War of the Spark prerelease ...