Siggeir steps closer to the man and starts stabbing him.
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Attack 1: (1d20+17)[27]
Attack 2: (1d20+15)[18]

Damage 1: (1d6+10)[14]
Damage 2: (1d6+10)[12]

Crit confirmation 1: (1d20+17)[27]
Crit Confirmation 2: (1d20+15)[20]

That's a full attack. I have a natural bite attack too and I seem to recall that I may use is in a full attack at a -5 penalty? If so:

Attack 3: (1d20+10)[16]

Damage 3: (1d6+8)[14]

Crit confirmation 3: (1d20+10)[23]

First two attacks Crit on 18-20 and do x2 and the other crits on 20 and does x2.

Oh and if he can take con damage then it's 2 from the first attacks and (1d4)[2] for the third one.