Control

Siblings Rhonda and Steven Barrok were destined for destruction.

Rhonda, Ronnie for short, was always a push over and easily taken advantage of by others, she never spoke up for herself and no one did so for her. Ronnie had always had a special connection with nature and other worldly beings. She is constantly used by her younger brother, he even uses her to contact the dying Overlord of Sinister Activities.
Steven had had a love for torturing and killing living things since he was little. Steven had a different type of special connection to animals, they were always drawn to him.

After contacting the rapidly deteriorating Evil Lord, Steven is determined to do whatever he must to convince (or trick) Ronnie into joining him for great power over all.
With Steven controlling creatures, and Ronnie controlling plants, the two are undefeatable. They could only be taken down by one another.