Every Disney Lorcana starter deck brings a solid array of cards and possibilities to the table, so picking up any of them won't prove to be a mistake, but Amber/Amethyst is generally the safest choice.
Each starter pack includes a default EX card and a one-star card, giving you a solid foundation to build on
Drake Haven is the third card I preordered, and possibly the best one
Lands that tap for extra mana are wonderful
But I dont think cards like this should ever existregardless of how hard the hoop is to jump through, Thassas Oracle is just too inexpensive and too acceptable on its own for a card that says you win the game. I think Thassas Oracle is a consequence of three things: Jace, Wielder of Mysteries blurring the lines of whats acceptable, a dictate to power up cards (including ones that normally wouldnt be meant for Standard), and a loss of institutional knowledge within Play Design about effects to be extra cautious about
Interestingly, both of the Dwarf Fortress creators in the video opened this as their bonus card, which could imply that its a guaranteed bonus and not a rare one