Knock Out later began experimenting with Synth-En to determine its potential as an alternate energy source, using C.Y.L.A.S., the fusion of the human Silas, and the remains of Breakdown, as a guinea pig. Infusing C.Y.L.A.S. with synth-en caused his human side to go made with rage while burning out his natural energon reserves. Starscream saw potential in C.Y.L.A.S. as a supersoldier and devised a plan to mix a drop or two of Dark Energon in his next infusion to grant Megatron control over him through the Dark Energon shard in his body... with disastrous consequences. Not only did the synth-en corrupted Megatron's link to the trace of dark energon in C.Y.L.A.S., he also became an Energon sucking Terrorcon that drains victims though a proboscis-like tongue and began rampaging through the Nem