You may cast the copy without paying its mana cost. Free spells, which also make all of your creatures stronger, can only be a good thing
The ceiling of this card is incredibly high, and you risk basically nothing since its only 2 mana
And between Dominaria and War of the Spark, we have a massive number of legendary things right now
Explore and Growth Spiral have functionally similar effects, but only Explore would be eligible for this list
It's an artifact creature at 8+.) 1+ | At the beginning of combat on your turn, put your choice of a +1/+1 counter or two charge counters on up to one other target artifact
I'm not sure there's a good answer for this one, but I want to acknowledge that this was, by far, the number one complaint I got about the set