Roll 1 twenty-sided die. Add +9. Compared against AC 15: you hit if the kept d20 face plus the bonus totals 15 or more (so the d20 needs to land on at least 6). A natural 20 always crits, regardless of AC. On a hit, deal 2 6-sided dice, plus 5. On a crit, double the damage dice (the 2d6+5 becomes 4d6+5); flat modifiers stay the same.
min 0
max 29
mean 9.35
187/20
±6.01
P(finish at 10 HP) =
63.33%
(3283/5184)
0
25.00%
1
0.00%
2
0.00%
3
0.00%
4
0.00%
5
0.00%
6
0.00%
7
1.94%
8
3.89%
9
5.84%
10
7.79%
11
9.76%
12
11.74%
13
9.86%
14
7.99%
15
6.14%
16
4.29%
17
2.43%
18
0.54%
19
0.56%
20
0.54%
21
0.48%
22
0.40%
23
0.31%
24
0.22%
25
0.14%
26
0.08%
27
0.04%
28
0.02%
29
0.00%
Roll 1 twenty-sided die. Add +9. Compared against AC 15: you hit if the kept d20 face plus the bonus totals 15 or more (so the d20 needs to land on at least 6). A natural 20 always crits, regardless of AC. On a hit, deal 2 6-sided dice (reroll any 1 once), plus 5. On a crit, double the damage dice (the 2d6r1+5 becomes 4d6r1+5); flat modifiers stay the same.
min 0
max 29
mean 10.02
601/60
±6.31
P(finish at 10 HP) =
70.79%
0
25.00%
1
0.00%
2
0.00%
3
0.00%
4
0.00%
5
0.00%
6
0.00%
7
0.05%
8
0.76%
9
3.40%
10
6.05%
11
8.70%
12
11.35%
13
13.26%
14
10.64%
15
8.06%
16
5.50%
17
2.97%
18
0.45%
19
0.56%
20
0.63%
21
0.65%
22
0.60%
23
0.50%
24
0.38%
25
0.25%
26
0.14%
27
0.07%
28
0.03%
29
0.01%