Dozen roses (to kill)

Number one and number two
midnight ebony roses, from me, to you
number three and number four
one touch of it, you fall hard on the floor
number five and number six
acid, poison, inside of it mixed
number seven and number eight
this your last time to live, you're meeting your fate
number nine and number ten
evil spirits in the roses i sent
number eleven and number twelve
don't blame me, blame yourself!