Because it is only then that you know you are playing Commander the way it was meant to be played.
however, post-release, the price has started to creep up a little on these decks from the pre-order price above from Wizards
8 Goddric, Cloaked Reveler Goddric, Cloaked Reveler is one of several red cards in Wilds of Eldraine that works well in the red-black and white-red archetypes and is an excellent flying finisher for either one in case the board state becomes stalled
Additionally, it gives us something to flash back to keep advancing our battlefield (which is much appreciated without something nice like Collected Company)
Fleetfoot Dancer Fleetfoot Dancer hits fast with haste, trample, and lifelinkgreat for aggressive or tempo-focused Naya decks
That character is Maui Half-Shark, and he helps make Ruby/Amethyst even stronger