For more information, please refer to the London Mulligan announcement.
Starting with the release of Core Set 2020, Magic: The Gathering Arena will be introducing a new mulligan system in all of it's formats: Each time you take a mulligan, you draw seven cards. Once you decide which hand to keep, you must put a number of cards from your hand equal to the number of times you have mulliganed this game on the bottom of your library in the order of your choice. In you mulliganed once, you have to put one card back, etc.
To ensure that everything is working correctly, and to give players a chance to try out the new Mulligan interface, we'll be performing a technical test during this week's War of the Spark Chronicles event.
Test Dates: June 7th - June 14th
Event: War of the Spark Chronicles Part III: Storm the Citadel
Cost: No Entry Fee!
We're looking for any feedback with the new system, and more importantly - any bugs!
LONDON MULLIGAN IN MTG ARENA
Your opening hand will appear as it does now, with an updated description to explain the new mulligan rules:
(Developer Note: ... yeah, this is a pretty good opening hand and I would probably keep it in a real match. Alas, the point of this guide is to show you how the new system works so we're going to Mulligan.).
If you choose to Mulligan, the new system will once again draw 7 cards. However, you will only be allowed to keep 6 of them:
If you select "Keep 6", you will be taken to a browser where you must choose 1 card to return to the bottom of your library. You will drag the card from your hand to the Library box, and select "Done" to confirm your pick.
If you were to select Mulligan again, you once again draw 7 cards, however you must choose 2 cards to return to the bottom of your library (as this is the second time you have mulliganed this game). Reminder: If you need to return more than 1 card to the bottom of your library, you do get to pick the order.
Once you select "Done", the game will begin. Please note that with these new rules, if you decide to mulligan you no longer scry!