The cheapest iteration of Rhystic Study is actually a rare reprint in Jumpstart, which currently goes for $32
It is here that a vast knowledge about Magic cards comes handy
The different kind of challenges in my opinion are more interesting than the run of the mill attack/defend of MTG
$0.49 Mad Science Fair Project Unstable $0.99 Dungeon of the Mad Mage // Goblin Token Adventures in the Forgotten Realms $0.49 Lost Mine of Phandelver // Skeleton Token Adventures in the Forgotten Realms $8.49 Sword of Hours Adventures in the Forgotten Realms Commander Decks $15.99 Sword of Forge and Frontier Phyrexia: All Will Be One $0.35 Foundation Breaker Modern Horizons 2 $0.49 Treasure Token Kamigawa: Neon Dynasty $6.99 Booster Tutor Unhinged $15.99 Toothy, Imaginary Friend Battlebond $6.49 Sword of Once and Future March of the Machine $0.79 Plumb the Forbidden Strixhaven: School of Mages $7.49 Booster Tutor Unsanctioned 0 results found
The ability to use Spire of Industry for colorless mana helps out decks with colorless requirements, such as an Eldrazi deck, and also gives an option to not have to take damage from using the land, unlike Mana Confluence
While I think kitchen imp is definitely better, a couple copies of swarm could be interesting as your 5th and 6th copy of Kitchen Imp
