Summary:

• Lots of styles coming out to purchase
• WOT cards will be just like the MUL cards: Available in WOE packs in the new artwork as a style. Only legal in formats where the original card is also legal,except in limited if you happen to open or draft them. (Of note, 6 WOT cards are preemptively banned in Historic: Necropotence, Blood Moon, Land Tax, Spreading Seas, Sneak Attack, and Intruder Alarm)
• Starting with WOE, new art reprints of rares and mythics will also fall under duplicate protection, so you won’t open yet another copy of a rare if you have 4 from other sets already. No clarification on how new art is obtained, though.
• New adjustments to the advanced filter in the deckbuilder, most substantially the filter will now indicate which sets are legal for the chosen format.
• New UI and animation for opening multiple packs, with a visual example in the article.
• Alchemy Renewal will trigger with the release of WOE, providing an alternate art Ashiok sleeve, packs, and ICRs in the mastery pass.