Teferi, Time Raveler makes it much harder for your opponents to react to game states, and is something that is just too strong in the lower brackets at shutting down cards being used at instant speed, all while letting you use your own sorceries at instant speed
What's more: Some of the most powerful cards printed in Alpha are artifacts, including six of the Power Nine spells, and Commander's most widely used card, Sol Ring
Your best turns are the ones where you pass with mana open and let opponents walk into a Spellstutter Sprite or Snaremaster Sprite
it evolves when you play a bigger creature, which lets it tap for more mana, allowing you to play a bigger creature to trigger evolve again, so you can tap it for even more mana, and so on
Early game for this artifact deck might look different from what youre used to
The Tenth Doctor could well be the card that changes all of that