Technically, the first Pirate was released in the block right before that with Kari Zev, Skyship Raider, but that was more of a teaser for what was to come
The fact that each copy can bring out the others makes Nimble Momonga an incredibly powerful defensive play, and is easily the best card at scoring you a huge amount of life points with minimal risk.
There are 14 borderless panel cards, consisting of 4 mythic rares and 10 rares
Most cards in a typical MTG player's collection will bulk cards of all four rarities, and these cards won't do much good sitting in shoe boxes or binders
My opponent, however, might have made a deck thats a bunch of really cheap-to-cast creatures
Add 1 "Witchcrafter" Spell/Trap from your GY to your hand