When Richard Garfield originally created Magic he had no way of knowing all of the innovations that would later come and thus, he didn't plan for most of them
You dont even have a mana restriction on what you can grab, so using one of them likely means you can tutor up any creature in your deck for only three mana
Ugin, Eye of the Storms While this is priced to move in Modern, where it's easy to go 1-2-7 with your manabase thanks to the Urzatron, I can see it sneaking into a Standard deck
Represents two different sizes of damage, for different board states, and once it's on a Worthy wielder, any form of incidental burn gets out of hand
If the ability is modal (that is, it has a bulleted list of choices), the copy will have the same mode(s)