Armor Class
Source GM Core pg. 121
Because AC is one of the most important combat stats, you need to be more careful when setting this number for any creature you expect to end up in a fight. Low AC typically fits spellcasters, who compensate with their selection of powerful spells. Most creatures use high or moderate AC—high is comparable to what a PC fighter would have. Reserve extreme AC for a creature that's even better defended; these values are for creatures that have defenses similar in power to those of a soldier or other heavily armored character.
Armor Class
| Level | Extreme | High | Moderate | Low |
|---|---|---|---|---|
| –1 | 18 | 15 | 14 | 12 |
| 0 | 19 | 16 | 15 | 13 |
| 1 | 19 | 16 | 15 | 13 |
| 2 | 21 | 18 | 17 | 15 |
| 3 | 22 | 19 | 18 | 16 |
| 4 | 24 | 21 | 20 | 18 |
| 5 | 25 | 22 | 21 | 19 |
| 6 | 27 | 24 | 23 | 21 |
| 7 | 28 | 25 | 24 | 22 |
| 8 | 30 | 27 | 26 | 24 |
| 9 | 31 | 28 | 27 | 25 |
| 10 | 33 | 30 | 29 | 27 |
| 11 | 34 | 31 | 30 | 28 |
| 12 | 36 | 33 | 32 | 30 |
| 13 | 37 | 34 | 33 | 31 |
| 14 | 39 | 36 | 35 | 33 |
| 15 | 40 | 37 | 36 | 34 |
| 16 | 42 | 39 | 38 | 36 |
| 17 | 43 | 40 | 39 | 37 |
| 18 | 45 | 42 | 41 | 39 |
| 19 | 46 | 43 | 42 | 40 |
| 20 | 48 | 45 | 44 | 42 |
| 21 | 49 | 46 | 45 | 43 |
| 22 | 51 | 48 | 47 | 45 |
| 23 | 52 | 49 | 48 | 46 |
| 24 | 54 | 51 | 50 | 48 |