"Memnarch or the vedalken salvage most of the large machines, leaving us only scraps. Scraps are enough."
Wotc usually hints at what’s coming next in a set or two prior. So, the new duals May look like the Thriving lands in Jumpstart but with The dual land types.
Which would be insane if they don’t ETB tapped.
Would make sense flavor-wise with Zendikar thriving now with the Eldrazi “dead”
On the other hand, they could also be a finished version of the playtest lands found in Mystery Convention Ed.
The pre-cons I enjoyed the most, and always recommend, were the Urza block With themes like Enchantments that “woke up” when something was cast, or cycling, reanimator, EhrnamGeddon, mono-Black discard, to u/w control. They had it all. ( a bit pricey now and sometimes difficult to find the more affordable opened decks)
Over the years they were less interesting and they discontinued the tournament packs, which were GREAT, but the worst had to be the intro decks. I believe started with Shards and ended in Lorwyn block.
Anything prior to that is decent. Only problem is they aren’t cheap and, like mentioned in an earlier comment, you’re better off just getting jumpstart..
Unless you really want the nostalgia
I think the best home would be in Oath of Druids which is uniquely soft to planeswalkers compared to decks that can run creatures. That's where I would run Beast Within, which serves so many purposes. By and large, I'd consider this card in upgrade in that slot.
Honestly, Oath is what made me give this card a second look.
The fact that it’s 2cmc and not 3cmc like BW makes a difference. At least in my list.