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My character went up against the black dragon(Niz-something) recently. He dual wields the Zerth blade and Celestial fury with a thac0 of -5 and -4 respectively. After the fight I looked at the message text and saw;
11+13=24: Miss
13+12(left)=25: Hit
Now, I'm pretty sure that the blk dragon's AC is either -12 or -10, lets says it is -12. How the HELL do I miss on a roll of 24 with a thaco of -5!!!! Doesn't this mean that the dragon's AC is approximately -29! I know dragons are tough but not that tough.
With a thaco of -5 attacking an AC of -12 shouldn't I make a successful hit with a roll of 7 or higher? -5 + 12=7
If I had a thaco of 0 versus AC -12 I would need to roll a 12 right? 0+12=12
If my calculations are correct then how do I miss with a roll of 24? Does the dragon have a very good slashing modifier? Could this be the discrepancy? Any clarification would be much appreciated, thanks.
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