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Packs can have more variance within them too, with certain cards having a set chance to be swapped for another of similar mana value and your mana base adjusting to the combined deck you end up with. The Jumpstart format has also been unbound from its paper roots – where the original would simply give you a random selection of themed packs to pick from, WotC tells me it can better collate Historic Horizons’ packs to offer a greater variety of options and synergies each time, or even keep track of which packs you’ve picked previously to provide fresh options on your next run. Davriel also uses the perpetually and conjure mechanics, further solidifying him as a planeswalker not meant for paper – in fact, Historic Horizons will have a "digital-first" Planeswalker for every color, each with a themed pack of their own. In a digital-only environment, there isn’t the usual requirement of spelling out every single detail on the card itself, which WotC says will open up new design possibilities or even allowing it to modify Davriel’s lists substantially post-release.