The ability to recursively abuse your best creatures is both unique and unlikely to be bettered in the modern era of Magic design
It provides mana and card advantage, making its serialized version a proper chase card with listings at $1,000
Not the worst rate, but not that earth shattering
While that might seem pretty cool at first, now that there are no rules around what cards can and cant be played (other than the ban list), you now suddenly have thousands and thousands of cards you have to somehow choose from in order to figure out what deck/combo you want to use against your opponent
These gave out Secret Rares of the monsters Guardian Angel Joan and Palladium Oracle Mahad respectively
Vines of Vastwood It gives a target dork you control hexproof this turn to remove targeted interaction, like, say, your Commander