SAVE $20.71: As of April 21, preorder the Magic: The Gathering Secrets of Strixhaven - Play Booster Box (30 Packs) for $143.99 at Amazon, down from its usual price of $164.70. That's a discount of 13%. $143.99 at Amazon $164.70 Save $20.71 It's that time again: a new Magic: The Gathering expansion is on its way. Secrets of Strixhaven is officially landing on April 24. It'll bring hundreds of new cards to the game, and if you plan on competing or collecting, you'll want to get your hands on some of the latest and greatest cards. You can do that easily with this discounted set that's up for preorder right now. As of April 21, preorder the Magic: The Gathering Secrets of Strixhaven - Play Booster Box (30 Packs) for $143.99 at Amazon, down from its usual price of $164.70. That's $20.71 off and a discount of 13%. Mashable Trend Report There are nearly 368 new cards that comprise Secrets of Strixhaven, with several magical colleges to explore in the world of Arcavios.…