The summoned character gains Rush - allowing them to attack on the same turn - and must be banished at the end of the turn, making the effect perfect for throwing attacks at your rivals without worrying whether your card survives
There's been plenty of innovation on the card type, though some of the strongest were in that original batch, which just shows how powerful they were when they were first introduced
You won't find value in it every game, especially if you're effectively controlling the board with all of your direct damage tools, but if you find it at just the right time you can gain a two, three, or even four lore instantly, which is often enough to close out a match in a deck like this
Smee could make for an excellent companion for cards like Jim Hawkins, Honorable Pirate if you decided to try out an Amber/Steel deck
If not Belle, pick a similar engine that converts board presence into resources