The Masterpiece Series, beginning with Kaladesh Inventions, introduced ultra-premium foil reprints inserted at a very low rate, proving the markets appetite for high-end collectibles
Before it dies, not only did it deal some damage and absorb a ton in combat, it drops more treasure than it's mana value and makes a big and splashy a move with it's super high toughness
Plan is a brand-new enchantment subtype for the villains, accruing plan counters as you carry out your scheme before paying off with a devastating reward
Atraxa, Grand Unifier Magic's strongest, scariest angel, Atraxa, Grand Unifier has great keywords, is one of the best lifelinkers in MTG, and looks like an impressive source of card draw