Terra

Season 8
Helena meets Terra who claims that she is better and will defeat her. Helena challanges Terra to a battle in which Terra loses. However, Helena didn't watch her back.. and while Terra had little aura left; used it all to slain Helena, and claim herself as "Helena's Replacement". In which she will be better, and stronger, but..Helena will return.. she always does.. You know the tales, the stories.. Bosses come back every year, if their dead..

Terra is exciting to feel the throne of a queen, demanding and striking to have the villains be the best they can be..however; she doesn't allow slackers!

Season 9
When the whole war started, she didn't believe for a fact that her babies (villains) are going to be in the war...its hurtful to Terra, as she to break the news and see some of them leave the nest. She then has became silent and nobody has seen her, unless somebody trusspasses into Villain Base territory.

At the end of the war, Helena erupts from Eclipso's realm, and kills Terra.