With the help of a Crobat V, you probably wont have a bad turn 1
Its more so the fact that many of emeralds cards play better in conjunction with other inks, rather than with themselves
Try thinking about the buying/selling pace that would match your personality (modern, mid, vintage, slow, fast, English, Japanese) and then finding a single set, or even a single Pokmon or single card that matches
When you play this, your creature makes the ultimate sacrifice to protect your team
If you play this card at the end of your first turn, you can effectively shut down your opponent, since theyll quickly run out of cards to play
Like Esika, he gives you access to all five colors, meaning theres nothing out of your toolbox