The demand for lands is high because every competitive deck uses the same lands
Arena of the Ancients obviously has potential in Commander, where it can tap down opposing commanders
All in all, Im still not a huge fan of Universes Beyond but Id much rather have these types of crossovers than things like The Walking Dead , Stranger Things , or Fortnite , which dont fit in with Magics design sensibilities at all
Furthermore, changing the target of a spell or ability with a single target is helpful in several scenarios
As mythic rares, these cards are going to be difficult to pack anyway, but these variants are likely to be highly sought after once the set launches, not just for the value a complete set of the elder dragon cards may hold, but also for their eligibility as Commanders