It also lets you have any number of copies in your deck, so you can exploit that if played right
At a Commander table, 3 out of 4 players in a pod playing Golos, Tireless Pilgrim has an immediate, negative impact on the format
Then it becomes an 8/10, etc
Its awkward, because this usually means giving your opponent an untap and draw step to answer your creature before you can realize any of the value that the card offers, but theres something here
Cabal Ritual works similarly, although it only provides one mana on top of the two you pay into it
There are actually several versions of Gandalf in the set (including Gandalf the White, whose color identity will not surprise you), and we show him at different points throughout the story by making him different colors