I personally, dont want an imbalance of earth cards in either faction. Please remove or change an earth card in Cthonic. Probably the permanent, since Gaian has Earth permanent.
However, I dont want to hold things up.
While Gaian has roots in the earth, Cthonic lives surrounded by earth.
While Gaian uses dirt, Cthonic uses dirt, rock and mineral.
I think the imbalance is fitting.
I respect your point of view but disagree.
I see this as a Faction War, centered around Earth. There should be a strong balance here, as well in any other Elemental Faction Wars, all sides should have equal use of the Central Element. Gaians probably use fire and gravity too, but its not reflected that way. Gaians probably pick up stones, and use metal for some things as well. Cthonics live in the Earth, but that doesnt make it as central as say Gravity, or Fire, or Darkness. I think its a part of their culture, but central to it.
Mostly, its that this is a Faction War, over the Element,
Earth and I think it should be as balanced as possible between the two. This is plainly about earth, as a barrier, above and below. If it were between Birds and Bats and Flying Reptiles, Id put Air in the same position, if between Sharks and Dolphins, water. It just kinda evolved this way, but that is a primary thematic fulcrum to this exercise.