The line for the beginning of a battle and for casting a spell are swapped.
In the beginning of a battle, he is supposed to say: I am king now of all I surveyhttp://www.dota2wiki.com/images/b/b4...ebegins_01.mp3

However he says the line that should be used when casting a spell: Finally.. http://www.dota2wiki.com/images/4/45/Skg_cast_01.mp3

NOTE: A while ago it was working just fine, but after Medusa got added the line got swapped.