Set sizes have varied over the years, but many modern-era sets fall somewhere between 200 and 250 total cards
If you want to mill players, Codex Shredder or the more expensive Altar of the Brood are great options
Illustrated by Heather Hudson Part of the Reserved List Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
Build your army, claim your victory, and achieve your Token Triumph
Wizards direct control over the future of the Commander format, and an attempt to stabilize the community after the controversy, led to the creation of a new five-tier power system, Brackets, to encourage players to discuss the competitiveness of their decks
It's by no means a complete list, but it touches on key highlights and underscores just how valuable the secondary market for Magic has become