One of the most common reasons for opponents to search libraries is to put lands onto the battlefield
It mixes a theme of caring about artifacts with mana value 4 or greater with monarch cards as a subtheme
"Only 4,000 to 10,000 cards were produced, most of which were played with and are now dogeared - so to find one in mint condition like this one, which has a grading of 9 (out of 10), makes it all the rarer." Other rare items listed for Friday's Pokmon Day auction included a full set of mint condition Jungle 1st Edition cards from 1999 valued up to 20,000, which went unsold
All That Glitters, Cranial Plating, Salvage Slasher, Nim Devourer, Digsite Engineer, Urzas Saga, Karn, Scion of Urza, Runaway Trashbot, Bronze Guardian, Monumental Corruption, Darksteel Juggernaut, Armix, Filigree Thrasher, Shambling Suit, Battle at the Bridge, Herald of Anguish, Inspiring Statuary, Sly Requisitioner all of these cards scale in a way that favors the Commander environment
Meanwhile, Tainted Indulgence and Thirst for Discovery each draw at least two cards at instant speed, so all by themselves, they can trigger all of our payoffs during our turn or at instant speed during our opponent's turn
