If you have a good rare or mythic that would fit the deck and improve it, then by all means add it
He grants you treasure at the end of your turn for each tapped pirate you control, and gives you 'impulse draw' when you land a hit on a player with a vehicle
There is a mulligan rule if you dont have a Basic Pokemon, you show your opponent your hand, reshuffle your deck, and draw seven cards again
They also have, Whenever you cast a spell with X in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it. That means that youll be generating an extra Hydra for nearly every Hydra you cast
When it enters, you can speed things up by removing counters or slow things down by adding them, which makes it great with and against suspended cards like Rousing Refrain