| Rank |
Description |
| Feeble |
Easily dominated or programmed |
| Poor |
Young, untrained, or hampered in sense of will |
| Typical |
Normal Human willpower |
| Good |
Resist ordinary mesmerism |
| Excellent |
Some experience with mental control and/or mystic forces |
| Remarkable |
Trained in resisting outside will-dominating forces |
| Incredible |
Highly trained, or possessing great strength of will |
| Amazing |
Indomitable willpower |
| Monstrous |
Intense training in mental powers, experience in wielding those powers |
| Unearthly |
A closed mind, practically uncontrollable by outside means |