This type of passive ability lets you play a draw-go style deck, with plenty of instant speed draw and counter spells to cast just before the end of your last opponent's turn or in response to a particularly annoying spell you don't want to resolve
Specifically for the Tearlaments deck, there are many options with endless combinations to make your deck outshine the competition
It's that, or collectors are suffering from serious FOMO
Since those cards are exiled and you will eventually, hopefully, cast some of them, you might want to include some cast from exile synergies with cards like Flaming Tyrannosaurus
That might be for cards that care about your opponents losing life, like Rakdos, Lord of Riots, or for lifegain payoffs like Drogskol Reaver
Items where restocks tend to last for hours rather than minutes