Drift gives him a half-grin.

"Well, Cybertronians live a pretty long time, and it takes a lot to kill one of us, though I've come close a few times." Getting squashed nearly to death on Theophany, falling on his own sword at Vector Sigma... "We can upgrade ourselves. Replace certain parts. But mostly we evolved, just like you humans."

But then he gives Robbie a quizzical look. "Wait -- Nova Prime?"