Havoc and Malice are the names of the twin axes used by Kain in the original Legacy of Kain game for the playstation. One of the coolest things he could do with them was, if you kept hitting attack, go into a whirling deathspin that cleaves right through anything in your way.
Oh, and his line regarding the axes:
"Havoc and Malice...though their presence in my hands prevents me from using magic, they do little to hamper my relish for slaughter..."