Hello,
Do not listen those audio files, if you don't want to spoil 5.4 Lore of the game.
Anduin Wrynn - https://www.youtube.com/watch?v=vZeV2Qv517Y
Chiji - https://www.youtube.com/watch?v=rb7zKWLe7j8
Garrosh Heallscream - https://www.youtube.com/watch?v=GQ1yxY8olFc
Jaina Proudmoore - https://www.youtube.com/watch?v=l3KL6ENWekE
LoreWalker Cho - https://www.youtube.com/watch?v=9YXwsk1eQsY
Lor'themar Theron - https://www.youtube.com/watch?v=0ZwThu8aVLQ
Malkorok - https://www.youtube.com/watch?v=ltssFTblJM8
Mekkatorque - https://www.youtube.com/watch?v=LgPVEWIaK8M
Moira Thaurissan - https://www.youtube.com/watch?v=-agP_LnyuMo
Nazgrim - https://www.youtube.com/watch?v=kMeUpKYL4SY
Emperor Shaohao - https://www.youtube.com/watch?v=BfT-IIBVuSw
Xuen - https://www.youtube.com/watch?v=ctoNGHFI28c
Yu'Lon - https://www.youtube.com/watch?v=1fEUTrdWaYg
This is it all 13 Sound files.