That gets way stronger with enchantments like Utopia Sprawl that allow your lands to tap for 1 or more mana or lands that innately tap for lots of mana, like Nykthos, Shrine to Nyx
I highly recommend having a look over here
Since we will be sacrificing so many artifacts, I really want to run pieces like Disciple of the Vault and Mayhem Devil
Like most Magic: The Gathering cards, the value of Teferi, Mage of Zhalfir depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy: Through the Ages)
When a token leaves the battlefield, it simply stops existing
Comet comes into play with five loyalty and only has a single loyalty ability, which is worth zero loyalty