"Harnessed" is a designation that the permanent has once an ability instructs you to harness it
The powerful elemental rewards you for playing a good spread of permanent types and works well with self-mill (turning your graveyard into you hand), self-sacrifice, or simply as a Sultai value commander
John Dale: The emphasis on gender is striking to me, largely because Magic in English has tried hard to move away from gender-specific terms for sapient, non-legendary creatures
The plane had some weird properties, as physics did not work there the same as it does on other planes, so you had odd things like an upside-down mountain (that most players thought was some kind of tornado)
They sit on the battlefield, not doing much on their own, and then suddenly become a mana sink to draw extra cards or fuel token, artifact, or sacrifice synergies