For example, while it's in your graveyard, Jidoor, Aristocratic Capital is a colorless Town land card whose mana value is 0
It featured in GP winning lists at GP Warsaw 2013 (Gruul Aggro) and GP Prague 2014 (UWr Midrange) doing what Dragons do best: topping curves and commanding the battlefield
As such, you've got to carefully time when and where to put down Energy
By incorporating Turtonator and Kiawe, it is possible to play aggresively while also having an answer for Pom-Pom Oricorio
Its not much of a typal commander since it cares about auras, but this is an excellent Voltron option
Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle