Those cards make it easy to filter your way to the deadly meld combination of Mishra, Claimed by Gix and Phyrexian Dragon Engine (the latter being an easy discard to your Fable triggers) and deliver an immediate killing blow
If you have to use any other Pokemon on the active, try to pull for Dialga ex to swap to it as soon as possible
Firstly, having a Rebel around gives our commander a way to avoid command tax and that is crucial since our strategies are build around our commander and the deck is very dependant on having Otharri on battlefield and attacking
is a deck focused on Artifact synergies and the energy counters mechanic first introduced in Kaladesh
While this all seems well and good, its a huge investment to make this happen
Similarly, in an era where I can run Doom Blade and Murder and other similar cards, an ability like Duh has Limited value