Created and popularized by fans, Commander is a casual format in which each player's deck is led by that player's commander traditionally a legendary creature, although this release introduces four planeswalker cards that can also be a deck's commander
Combine it with cards like Arcane Adaptation (which changes the type of every creature you control to another of your choosing), and you can easily start locking players out of the game
Ultra PRO quality ideal for long-lasting use
As I've mentioned numerous times before, I view EDH like playing a board game
However, outside of that, Cloud also lets you draw for each equipped attacking creature you control, rewarding you for playing out a bunch of equipment and having a wide board
Often in EDH you'll just want a 1-mana cantrip to fuel some storm or Izzet shenanigans