Simple and elegant
With that initial design fail handled I got over the one drop situation and cut everything that wasn't a gold card, a land, or an artifact, the latter groups of which were almost exclusively there to assist with fixing
So many silly combos here, but Myr Retriever is just a useful creature for a small bit of artifact recursion in any EDH decks with an artifact theme
Being an X spell makes it versatile, so you can drop this Esper commander early or late, depending on what you need, and its flying ability can keep your opponents on their toes
Sure, it has fewer keywords, but The Prydwen makes up for this with better stats and a much stronger token-generating ability in a general sense
The change isn't simply that Rares got less playable, because they haven't