Homunculus The single-eyed homunculus players associated with Fblthp, the Lost has been around since Sneaky Homunculus back in Nemesis
The 9.5 Gem Mint is the real workhorse, the Black Label 10 carries an outsized premium, and half-grades show up where they dont elsewhere
For those decks where it was castable and removal was called for, Vindicate often made it into Extended and even as far as Legacy
Its usually not too hard to get combat damage through now and then during the course of a Commander game, which means that he can probably help you cast a lot of spells under the right circumstances
13 Phyrexian Metamorph The Phyrexian Metamorph is an impressive creature that was originally released in 2011 via the New Phyrexia set, which was the third set in the Scars of Mirrodin block
Mew might not be completely essential, which is why we see only two copies of it in the list, but it very much helps in smoothing out the decks consistency