We designed a bunch of "wild card" commanders along these lines
Theyd figure out how it should be illustrated. A lot had happened in the intervening 25 years since that conversation, events that neither of us would have predicted in 1994, including that one day Garfield would be interviewed by Sams younger brother, Tom, who gets paid to play video games at IGN
The War Doctor can become a potent attacker depending on how many cards you manage to phase out from either side of the field
And the Eldrazi are all colorless and great ways to dump 10+ mana in a single turn
That's all well and good, but if you can hang on to that Metalworker you often end up with eight, ten or even more mana by showing your opponent most or all of your hand
This means he tends to clear the board and then kill opponents rather than going directly for the kill but he does all this quicker than most