Certain cards (like Manor Guardian, visible in the gallery above) will allow you to seek a card with specific criteria, randomly pulling one from your library that meets that criteria without shuffling afterward something that couldnt happen at the tabletop without a player manually looking through their deck
Well, its a common, and very easy to justify
It's solved when you have no suspected skeleton on your end step and once solved you can pay , sacrifice it, and search for any card in your deck
Its rather like Nadu, Winged Wisdom-lite in how you can take incredibly long turns generating value without getting anywhere but annoying your opponents
Gishath, Sun's Avatar If you want to build a dinosaur-themed Commander deck, you cant go wrong with Gishath, Sun's Avatar