Among those Shiny Pokemon are must-haves like Charizard ex, and Lucario ex, but also some questionable choices like Varoom and Weedle
Therefore, most blue decks will contain one or two very expensive, very powerful creatures genies, sphinxes or sea monsters that can win the game once the opponent is under control
Cuts were mainly due to cards being pretty mediocre to draw outside specific situations, high mana costs, or just not contributing to what we want to be doing which is goading, and winning the game
Labyrinth Heavy Tank : When summoned, allows you to get one of The Big 3 out of your deck and onto your field as a continuous spell
Lusamine is another Supporter card which allows players to attach 2 random Energy from their discard pile to one of their Ultra Beasts
As such it is rather on the expensive side as you will need to also play more reliable finishers as well