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Chapter 2: Building Games / Building Creatures / Defenses

Armor Class

Source GM Core pg. 117 2.0
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 is even better defended; these values are for creatures that have defenses similar in power to those of a champion or monk.

Table 2–5: Armor Class

LevelExtremeHighModerateLow
–118151412
019161513
119161513
221181715
322191816
424212018
525222119
627242321
728252422
830272624
931282725
1033302927
1134313028
1236333230
1337343331
1439363533
1540373634
1642393836
1743403937
1845424139
1946434240
2048454442
2149464543
2251484745
2352494846
2454515048