This last part is enough to put it on a list, and like Fungus Sliver, it can become infinitely large with the proper setup
One slot in a booster pack is set at Rare or higher, so in theory you should get one Rare per booster, but Super Rare and higher cards are much scarcer
I hope that this Midnight Hunt Guide to the Day/Night Cycle will provide enough information that you can start taking advantage of the moon cycle and flipping cards at a rapid pace
It gives a creature +1/+2 until the end of the turn, which can save it in combat or help push through damage
#8 Spelunking Set: The Lost Caverns of Ixalan Market Price: $3.17 Spelunking is a fairly costed ramp spell that also draws a card, and offers insane combo potential with any cards that put lands into play tapped like Arboreal Grazer and Scapeshift
Shocker, Unshakable is a six cost, 5/5 Legendary Creature that, on entering play, deals two damage to a creature and two damage to that creature's controller, effectively casting Shock twice