If you like connecting with your Commander early or want to explore Historic, Assassin, or Pirate synergies, theres a lot for you here to look at
Tawnos, the Toymaker BPhillipYork: Fun and flavorful, there's a lot of really solid low CMV birds that would be fun to clone
Obviously, players will want to have a full playset of four cards, so it could get expensive
Look at hand effects let you rubberneck, some cards let you cheat out permanents without paying their mana cost, and infinite hand size cards let you keep more resources than normal
Omnath's last ability isn't a mana ability even though it can cause you to add mana
[9] Its also the riskiest though, so only sell to reputable buyers