What do you think the best kill voice line is?
Personally, my favorites are when
Jojo kills dibbles
Mephisto kills Malthael
And when Zarya kills tracer
Jojo says “how many times was that Diablo”
Mephisto says “So even death may die”
And Zarya says “not fast enough Tracer”
Deathwing to Ragnaros:
“You will always be a tier below me, Firelord.”
Only people who played in Cata know that referance.
I never played WoW but still know the reference 
Not a kill line, but I love Anduin’s lines when he pulls Varian.
I’VE GOT YOU FATHERR
Full sentence woo
I’m pretty sure someone said that Qhira replies to Hanzo’s death with “Simple subtraction”.
Nobody let her know about pool party Tychus then…
His huge super soaker is the only thing she would notice.
I can’t choose from the Diablo lines. If I had to pick one I guess I’ll go with: I’ll see you in hell!
I do enjoy the Diablo announcer line when someone reconnects to the match: The fool has returned! Kill them!
Edit: Since my post got removed instantly, this post makes a lot more sense!
I really like Cho’s “Fall before CHO’GALL!!!”, for some reason it gives me a power-fantasy rush, even if I didn’t do anything special to get the kill 
If it’s about specific hero interactions, the other day I killed Alex as Hanzo and he was like “Am I ready now, Lifebinder?!”, which was a nice throwback to the whole “Dragons of the Nexus” thing.
But my favorite is probably when Zul’Jin kills Nazeebo: “Maybe I carry your head around for a while!”
Deathwing killing Anduin. It’s my favorite. Deathwing sounds so done, compared to normal “rawr I’m deathwing!!!” voice lines.
“I don’t know what Wrathion sees in you.”
Don’t know how the English version goes, in Spanish Tychus tells Thrall “Sorry, you’re still too green”
it always has been and will forever be “see you in hell” from diablo 
It’s Brightwing of course, she has so many great lines the cute little psychopath, here is one of my favorites, it’s to Anub’arak:
“Brightwing no like icky beetles! Ugh, too crunchy!”
Sorry, it won’t allow me to link the audio.
Tychus to Abathur, “What the hell did i just kill?”
TLV to Abathur:
Erik: What kind of alien was that?
Olaf: I don’t know. I think I saw it at Blizzcon.
Ana vs. young women:
Orphea vs. Alliance Hero:
Orphea vs. DragonShire Hero:
Only Time, DW gets personal (vs. Varian):
Stukov vs. Abathur:
Morales vs. Pandaren Hero:
Sapper Junkrat vs. Warchief:
Sapper Junkrat vs. Gazlowe:
The Ana one… 10/10
And genji says “Talking pandas, feels like im the bad guy this time”