Millstone is the origin of the trading card game "milling", which is basically to moving cards out of your opponent's deck into somewhere less useful (typically the graveyard), and denying them resources that they could use
Sealed events provide you with six booster packs to build a 40-card deck, with each pack containing 15 cards from the current set
7 Trail Of Crumbs Makes The Most Out Of Food Tokens There is a fair amount of midrange builds that look to exploit food tokens, which were introduced in Throne of Eldraine
It's a dubious commander for Spitting Dilophosaurus, which is never going to pass as an elf, even with prosthetic ears, but it's caused this price spike because it seems to indicate that putting these counters on opposing creatures will be a key part of the set
Time Walk (Alpha Edition) $26,400$63,000 PSA 10 Gem Mint Why It's Valuable: "Take an extra turn" for two mana
They come in six different colors, in three different finishes (gloss, flat matte, and super matte)