You get to utilize repeatable mana and card draw engines, meaning you dont run out of card draw spells
As free spells, they dont always have a massive impact on the game, apart from some potent design mistakes, often cantripping or making a bit of mana on the side
Ramping your mana is great of course, but the Prospector can also enable some instant-win combos
While the cards have sold at a decent discount, its a bit harder to ensure the cards are shipped quickly and in good condition when compared to other sites
Alpine Guide Arid Mesa Bedhead Beastie Bloodstained Mire Bountiful Landscape Cabaretti Courtyard Call the Mountain Chocobo Chartooth Cougar Cragsmasher Yeti Farseek Furnace Host Charger Gem of Becoming Grixis Panorama Hill Gigas Igneous Pouncer Jeskai Monument Jund Panorama Koth, Fire of Resistance Maestros Theater Mardu Monument Molten Man, Inferno Incarnate Mongoose Lizard Mountain Valley Naya Panorama Oliphaunt Perilous Landscape Riveteers Overlook Rocky Tar Pit Ruin Grinder Seething Landscape Seismic Monstrosaur Shard Convergence Shattered Landscape Sheltering Landscape Spoils of Victory Temur Monument The Cave of Two Lovers The Infernus There and Back Again Twisted Landscape Untamed Wilds Valley Rannet Wooded Foothills Zog, Triceraton Castaway