Given that its name includes the Ursula-specific Deep Trouble subtitle, I would be surprised not to see more Illumineers Quest products hitting store shelves alongside future Lorcana sets, assuming this one performs well
Both sides can be nice in certain situations, but even when you have both options, neither ends up feeling too great a big chunk of the time
Ego Drain loses its downside when you control a fairy, while Nectar Faerie can give one of your faeries lifelink for a turn
Sudden Substitution The idea behind Sudden Substitution is to cast a cheap, meaningless spell and swap it for the best creature on board
This is so good, that you cannot imagine, and it's one more mana than Explosive Vegetation and variants but another land to your hand, so it's worth it
Its really a kind of economic eco system that will have you exploring everything the digital version of Magic: The Gathering has to offer, eventually you will find formats and a routine that works for you and as your game improves you will find yourself not only competing regularly but doing far better then you thought was possible