Talk:Bell-Walker (5e Class)
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I understand this point, but I am afraid you misread it. It is not out of a d20 for the insta-kill. It is a d100. On a 100 of a d100, it's an insta-kill, and the number needed is reduced by your constitution modifier. At max, that would be a 95-100, which is a 5% chance, not a 1/20th chance, or 20%.