Just Dragon Broodmother will get you this for free, though few other cards work as well as that does
Play four Persistent Petitioners, and suddenly your opponent needs to mill twelve cards
Are you looking to cheat on casting costs by reanimating high mana value bombs
at minimum, youre guaranteed three extra cards per turn one for each opponents draw step
(Until there are enough options for a high-density of solid sacrifice outlets in Temur colors, I wouldnt go all in on that plan, but the one-off is a nice option that synergizes with the rest of the deck.) There are a lot of creatures with great abilities for +1/+1 counters, and we also just want back-up options in case casting our commander becomes difficult
While Spyglass costs an extra mana it lets you take a look at your opponents hand to see if a better option presents itself, which makes it a better card to side in if you can reliably cast it