Transformers: Optimus Prime, Vol. 4

Transformers: Optimus Prime, Vol. 4

<b>Darkness falls over Cybertron as the legendary Onyx Prime returns, throwing the planet into chaos! What does this mean for Optimus Prime--and Earth?</b><br><br>As Onyx and his comrades sow panic and dissension on Cybertron, Windblade defends an already tense planet against a secret that could shatter it forever, while Soundwave questions a fragile alliance, and Optimus confronts a mystery that goes back millions of years. <br><br>Collects <i>Transformers: Optimus Prime</i> issues #15-21.