Wizards likes a 2:1 ratio for rares and mythics, so the pool of available cards will be 75 cards deep
This could have more added utility because nonred, nonblue removal in M21 seems below par, but there also are scant synergies to make it more than the sum of its parts (as was the case for Scalding Cauldron)
It only produces colorless mana, and all three of its abilities are fairly overcosted, but that doesnt really matter
Creature-heavy decks, like Giada, Font of Hope, meanwhile, do want to get into combat but also play a bunch of heavy hitters, making this a great inclusion
Whenever you discard a land card, exile the top card of your library