Durability

His Unicron-forged core circuitry was impervious to null ray technology, but that was an advantage Cyclonus did not intend to share with anyone until Starscream hopefully made a trial of it that would give Cyclonus the excuse to rip his cranial unit off his spine the way he felt an increasingly passionate desire to do.

[...]

And then, behind him, like a song of exquisite beauty, rose the sharp peaked whine of a null-ray firing. Cyclonus halted in his tracks even as the squealing echoed off the bare walls and the blast struck him in the middle of the back, the entropic radiation frantically traveling all over his body trying to get purchase on him, on any part of his armor, useless except to trigger his pain circuitry to a level of frenzied agony that could not compete with the nearly beatific relief swelling through him. Cyclonus stood beneath the spidercrawling mesh until the power faded out of it, and then he turned, his gun already in his hand.