Its value has gone up and down a bit over the past couple months since the set released in July 2025, but has been fairly steady for a while now
A card with a dramatic gap almost certainly is, but only if youre confident in the condition
Rin and Seri, Inseparables color typing is perfect for these creatures, and the combination of burn and lifegain on its last ability is beautiful
So you can easily harvest 14 or 15 mana of cards from your 7 mana investment even in a deck not built around breaking it
Now if the UG lands player doesn't have a sufficient landfall threat on the board, he or she can still find value in returning their lands to hand, discarding them for value (maybe to Wild Mongrel, Noose Constrictor, etc., or Turntimber Sower, if not Trade Routes), and having options to re-play them for future landfall triggers or other shenanigans
As noted earlier by Susan, some of the uncommons are the most challenging cards to obtain in high grade