Because many of these effects also hit multiple targets, you can target an additional ETB creature and generate tons of value in the process
Surveiling multiple cards lets you keep them on top of your library but re-order them how you see fit, while scrying multiple times can become redundant if you choose to keep a card on top early on
As I noted, the original artwork for cards was changed after this set, there was one card in the set that had its artwork changed, or tweaked from Revised to Fourth Edition
Unlike some of the other Unown cards on this list, the Unown "!" has experienced a massive dropoff in value, as it once eclipsed the $50 mark, and now barely holds onto a sub-$30 value
Now, notice this is time-gated as an ability after you draw 7, you get the opportunity to free cast stuff