Arsenic

Arsenic is a villain to Fusion.

Bio
Larry Dillard was a scientist and engineer who was put in charge of creating new poisoned base weapons for the military, along with a suit that was block the effects of the toxins. While being a very bright man, Larry was also an opportunist and decided that his weapons would be better fit for a life of crime, taking the name Aresnic.

Arsenic then faced off against Fusion multiple times and every time he was thrown into prison. Eventually Arsenic joined Jack Frost's villain team, the Syndicate.

Involvement in Civil War
Arsenic was chosen a part of Stephen Stryders anti super human task force known as the Exterminators. While in a battle with Grid, Arsenic was nearly shocked to death but he survived due to his armor.