The deck was really missing a card like this and it could easily become a thing at some point
A draw engine that can go in every deck is already dangerous, the fact that its one of the most efficient draw engines ever printed exponentially compounds the possibilities for it to snowball
It does bother me a little that it itself is not a permanent, because most of your Black/Green decks are going to want as many permanents as possible to get the best mileage out of all the Descent stuff, and obviously it isnt very good in your opening hand A 5-mana 6/4 with Vigilance and Menace is already a pretty imposing creature, and this one can come back in the later stages of the game
It will allow you to outplay people and might not seem exciting but then many of the best cards aren't
It shuts down your opponent's ability to attack with more than one creature
With Pocket s trading feature on the horizon, extra rare Pokemon can be exchanged with other players, helping you complete your Pokedex more efficiently