In a lot of cases, you'll be unearthing creatures to get in one more attack
Shoreline Looter Shoreline Looter is the rat version of Looter il-Kor, although one that can draw without discarding if you have threshold
Throne of Eldraine brought with it a bunch of interesting support cards for the mill archetype, which, when combined with some holdovers from last Standard like Drowned Secrets, give us the critical mass of mill cards necessary to make a (possibly?) competitive deck
Additionally, upon entering the battlefield, Karrthus's controller gains control of all Dragons on the battlefield, meaning that if another player happens to be using a great Dragon card such as a Goldspan Dragon, that value can be stolen for the Karrthus player
The Non-Foil set is priced at $29.99, while the Rainbow Foil set will cost $39.99