Re: Did Spock ever kill anything?
What about "The Tholian Web"?
Spock is in command and orders a phaser strike on the first Tholian vessel. It is damaged to the point where it doesn't move again until help arrives. Surely at least some of the Tholians inside were killed or at least severely injured.
“A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP” — Leonard Nimoy (1931-2015)