Bowie, INFI mudder and a sharpening steel 'in disguise' would fit the bill as your three heads! Same sort of idea as a traditional khukri; chopper, utility blade and striking steel.

'Dear Santa, for Christmas I want a big sharp Dan bowie. I know I haven't been very good this year, but hell what can you do?'

JYD #3 Poor, but still dreaming of a sage and black SOD CG...