Energon dome

An energon dome is a defensive shield used to protect villages.

Fiction

Dreamwave Armada comic

The Mini-Cons at Village C52 set up an energon dome to defend their village against the Decepticons, who were raiding the Mini-Con Sector for Mini-Cons. They failed to consider an attack from below, as Cyclonus simply emerged from the ground and destroyed the dome generator, allowing the other Decepticons to enter the village. Armada #1

When the Autobots investigated, Red Alert mocked the Mini-Cons' use of filtrek-A forceshields, noting that the new filtrek-H model was superior. Armada #2