Garnet gives you a lot of flexibility, and its hard to go wrong either way
It's rarely a dead card because it can also target your own creatures, which means it can be used in a pinch to buy back a creature with a powerful enters-the-battlefield ability such as Druid of Purification or Uro, Titan of Nature's Wrath while untapping 2 of your lands
Kellogg, Dangerous Mind isnt the guy that invented cornflakes and inflicted horrendous morning blood sugar spikes on the masses
Phabine, Bosss Confidant Phabine, Boss's Confidant is the kind of commander you have to answer the turn it comes down or it may end the game
Triassic Egg is quite cute, even if its existence does hint that Dominaria has its own version of a Triassic age
+2: Tezzeret deals X damage to each opponent, where X is the number of artifacts you control