Firstly, drawing 10 cards is absolutely nuts, even if you have to discard during Upkeep (And you often do) it's very helpful to restock your hand with helpful cards
If it's like this, it's no different from using other five-color commanders
Drifloon is crucial for Psychic-type decks to thrive currently because it is the main way that these strategies have to deal with high-HP Pokmon
1 Misty The Odds Never Feel In Your Favor One of the best cards overall in the game, Misty is a Trainer that is made exclusively for Water-type decks
Misty can help with energy acceleration a bit, but sometimes this deck can't keep up with more aggressive decks in the meta
Much like Uril, she is hard to interact with, which helps a lot with building up a deadly creature