Yes, Elemental Conglomerates is a must.
I think it would be a cool idea as the sacrificial pit type building that you wanted. Sacrifice 2, make 1
Dust elemental (air, earth)
Ice elemental (air, water)
Spark elemental (air, fire)
Lava elemental (earth, fire)
Mud elemental (earth, water)
Steam elemental (fire, water)
I think it would be a cool idea as the sacrificial pit type building that you wanted. Sacrifice 2, make 1
Dust elemental (air, earth)
Ice elemental (air, water)
Spark elemental (air, fire)
Lava elemental (earth, fire)
Mud elemental (earth, water)
Steam elemental (fire, water)