Mortilus

Mortilus is a deity from the Generation 1 continuity family.

I was Megatron before Mega was even a prefix!

Mortilus the Death-bringer is a god during the earliest period of Cybertron.

Fiction

IDW Generation 1 comics

Spoiler warning: Plot details for Primus: You, Me, and Other Revelations follow. Please give an expiry date ({{spoiler|(story)|DATE}}) - either the date of the next episode/issue in the series or 30 days after release, whichever is sooner

The Death-bringer's origins were tied to Primus the First Light when Cybertron was initially formed. In that time, the Light God split his essence into five avatars of his being. These included Mortilus, Solomus, Epistemus, Adaptus and Primus himself who all formed a pantheon of deities called the Guiding Hand. Mortilus became the Death-bringer who represented the necessary corollary to life. These gods brought about the first Golden Age for Cybertronians which was shattered when Mortilus brought division amongst them as he wanted to wage war against the cosmos. His dissension saw Solomus entrapped in a crystal container, Epistemus as a brain module, Adaptus as a transformation cog and mortally wounded Primus himself. Mortilus's rebellion caused Cybertron to shudder and ripped asunder its first moon. Ultimately, he was destroyed and his death allowed Cybertronian Spark's to burn for eternity as immortals. Primus: You, Me, and Other Revelations

While explaining to Springarm that he was skeptical of religion, Orion Pax listed Primus, Mortilus and Adaptus as examples of gods he didn't believe in. Chaos Theory Part 2