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 1 12-sided die, plus 5. On a crit, double the damage dice (the 1d12+5 becomes 2d12+5); flat modifiers stay the same.
min 0
max 29
mean 8.95
179/20
±6.18
P(finish at 10 HP) =
51.46%
(247/480)
0
25.00%
1
0.00%
2
0.00%
3
0.00%
4
0.00%
5
0.00%
6
5.83%
7
5.87%
8
5.90%
9
5.94%
10
5.97%
11
6.01%
12
6.04%
13
6.08%
14
6.11%
15
6.15%
16
6.18%
17
6.22%
18
0.42%
19
0.38%
20
0.35%
21
0.31%
22
0.28%
23
0.24%
24
0.21%
25
0.17%
26
0.14%
27
0.10%
28
0.07%
29
0.03%
30
0.00%
31
0.00%
32
0.00%
33
0.00%
34
0.00%
35
0.00%
36
0.00%
37
0.00%
38
0.00%
39
0.00%
Roll 1 twenty-sided die. Add +4. 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 11). A natural 20 always crits, regardless of AC. On a hit, deal 1 12-sided die, plus 15. On a crit, double the damage dice (the 1d12+15 becomes 2d12+15); flat modifiers stay the same.
min 0
max 39
mean 11.07
443/40
±11.45
P(finish at 10 HP) =
50.00%
(1/2)
0
50.00%
1
0.00%
2
0.00%
3
0.00%
4
0.00%
5
0.00%
6
0.00%
7
0.00%
8
0.00%
9
0.00%
10
0.00%
11
0.00%
12
0.00%
13
0.00%
14
0.00%
15
0.00%
16
3.75%
17
3.78%
18
3.82%
19
3.85%
20
3.89%
21
3.92%
22
3.96%
23
3.99%
24
4.03%
25
4.06%
26
4.10%
27
4.13%
28
0.42%
29
0.38%
30
0.35%
31
0.31%
32
0.28%
33
0.24%
34
0.21%
35
0.17%
36
0.14%
37
0.10%
38
0.07%
39
0.03%