I am black when you buy me
Red when you use me
Gray when you toss me out.

Well, you are technically correct. Biologically speaking, sperm is alive, though, and instead of helping people live, it is half the reason people are alive.

A bite.

King - less experience in crude fighting, may not penetrate skin
Peasant - more experience in crude fighting
Frogs - have you been bitten by one? It's just some water washing over you.
Dogs - from personal experience, yes, dogs can have hot bites.

Ah, sorry, too late here.

Next:

Chameleons, ash

Edited 10/9/2015 03:27:52

charcoal

wct is correct.

A word I know
Six letters it contains
Subtract just one
And twelve remain.

Apotre ?

I'm just as right as wct; none of these things absolutely happen.

Anyhow,next riddle:

Twelver (the biggest Shia branch)

edit: misread the riddle, Cacao has it right

Edited 10/9/2015 06:32:09

cream-filled doughnut.

haha Cacao this one was insane

skin disfigurements.

Is this even a Riddler riddle?

I dunno. One I saw on the net:
What goes down an alley and has holes in it?

Edited 10/9/2015 12:03:47

Batmans parents

Real answer is a bowling ball.

Okay, back on track now.

You hear me once,
Yet you hear me again,
but I die,
Until you call me once more.

Echo?

Death gets it.

When you have me you want to share me,
But when you share me
You no longer have me.

Mystery?

close

Secret?

Correct.

The eight of us go forth not back
To protect our king from a foe's attack.