These, my friend, are adventures
List printings arent typically cheaper than their originals like this
You can use these cards as quick references for your next campaign instead of hauling out the entire Monster Manual to show your players what creature they've encountered
The differences seem to be as follows: +2 Mausoleum Wanderer +1 Shacklegiest +2 Spell Queller +2 Lantern Bearer +4 Curious Obsession +4 Geistlight Snare +3 Adarkar Wastes +1 Otawara, Soaring City +2 Hall of Storm Giants +2 Mutavault +4 Hallowed Fountain +4 Hengegate Pathway +4 Seachrome Coast +4 Portable Hole +3 Slip out the Back +1 Deafening Silence +4 Wedding Announcement +1 Cemetery Illuminator -2 Remorseful Cleric -1 Selfless Spirit -4 Watcher of the Spheres -4 Empyrean Eagle -4 Spell Pierce -2 Glacial Fortress -4 Temple of Enlightenment -8 Island -7 Plains -1 Aether Gust -2 Silkwrap -2 Seal Away -2 Light of Hope -1 Devout Decree -3 Isolate Now, I get it, this looks like a lot of changes, but many of them are upgrading the mana base, and building a sideboard tuned for the current metagame, as the one in the challenger deck was made in 2021
I had a different friend who loved attacking with lands, so they found all the different cards that let them do that
2/1 Illustrated by Bram Sels
