[Update #2]: The Baldur's Gate set has now arrived alongside a variety of rebalances.

[Update]: After years of dominance, MTG Arena is nerfing two of the best decks in the Historic format.

In an effort to spice up the struggling Alchemy format, as well as to give to Historic Brawl players a whole bunch of new toys, the MTG Arena team will be releasing the Alchemy Horizons: Baldur's Gate set this July 7th. It'll bring with it a whole assortment of cards from the Commander Legends: Battle at Baldur's Gate set, a bunch of the Commander focused Baldur's Gate cards rebalanced with 1v1 play in mind, as well as a variety of new-to-Magic cards that heavily utilize the digital design space.

Speaking of which, Alchemy Horizons: Baldur's Gate will bring with it three new keyword mechanics: Specialize, Double Team and Boon. Here's a brief rundown of what each of these does:

Specialize - After paying the Specialize mana cost and discarding a color/land of your choice, you will be able to transform your card to one of five potential versions, each one influenced by the additional color you've added into the mix. Each of the transformed cards do pretty much the same thing with a small twist, so as wordy as the cards may appear, Specialize should  not be a particularly confusing mechanic.

Double Team - "When a creature with Double Team attacks, if it's not a token, conjure a duplicate of the original into your hand, and then both cards lose Double Team." Essentially, Double Team is a roundabout way of giving you a second copy of a creature. It really is as simple as that.

Boon - Instead of being a brand new mechanic, Boon is more of a helpful tool. It's basically an emblem that represents delayed triggers, for example "whenever you cast your next creature, give it +1/+1." And once that trigger has been resolved, the Boon disappears as the reminder is no longer needed.

Now that you have a basic idea of what the new keywords are all about, you should head on over to the MTG card gallery to check out the full set. If you're mostly curious about the new Historic Brawl commanders, however, make sure to check out the bottom of the page as that's where the multicolored and Specialize cards are.

Once the Baldur's Gate update goes live I'll make sure to let you know. Until then, you can read a little bit more about Wizards of the Coast's plans for MTG Arena over at the official website.