This includes lands, but also high-mana finishers or planeswalkers that can immediately stabilize your board
The same is true for counters that change a creature's power and/or toughness
Obviously, X-spells were great mana sinks, but artifacts with healthy activation costs were also big-time favorites, and Mishras Factory was a potent buy-out for those spots where you needed to Mana Drain but had nothing to use it on, plus nothing on top of your deck
To make it worse, let me quote from Wizards website: Karn Liberated is 2025s Pro Tour and World Championship Secret Lair prize card, so expect to see more of our favorite sun-tanning silver golem throughout the year at the Magic Pro Tour. Right now, on eBay, I can find nonfoils under $300 and foils for $1200
? Fits fully into Graded Shoe Box