It consistently ranks among the most valuable non-first-edition WOTC holos on the secondary market
Urza's Saga Urza's Saga is one of the few enchantment lands available, and an easy card to include in artifact or enchantment decks, seeing play in every format its legal in
It cannot be destroyed by battle with a dark, earth, water, fire, or wind monster
Life Loss and Rad Counters Drain opponents over time, reflecting the slow, dangerous spread of radiation
The rainbow colors in SWSH are more vivid and with more glittering, which could make people feel too much visually
Considering the fact that WotC moved the B&R announcement up a day and are talking about it so vocally, I expect that it will actually contain something of substance