During their turn, a player may search their deck for a Stage 1 Pokmon that evolves from 1 of the Basic Pokmon they already have in play, then place it onto that Pokmon to evolve it
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.
As a Mitsuhiro Arita piece, it is part of the narrative that sees the Squirtle line moving deeper into the water as they evolve
Of all the typal precons Wizards has done in the past, this one stays most true to its creature type
The only thing holding you back is how many energy you are able to get into your discard
A dedicated UR build can load the graveyard very easily with self-mill and looting effects, so I could even see Eris hitting play around the same time as Stella despite the huge gap in mana cost