Aries: big old knife like Jeff's

Taurus: a normal sized knife

Gemini: a bat

Cancer: "I USE MY BARE HANDS"

Leo: a bigger knife than Jeff's or a Katana

Virgo: a pipe

Libra: a bat

Scorpio: a scalpel

Sagittarius: a sword

Capricorn: an axe

Aquarius: scythe

Pisces: "I BURN MY VICTIMS ALIVE!!"