Skill Hand to Hand
The skill that governs how efficiently you fight without weapons. Fists become magical by equipping a Hands slot (i.e. gloves) item that is "MAGIC ITEM" (which will defeat the magical invulnerabilities of mummies, wisps, and the magical undead).
Note: There seems to have been a bug about how the cap check is calculated - it was possible for certain classes (e.g., Clerics) to reach skills higher than the cap if they continued to obtain skill-ups after passing the cap as long as the character does not camp or zone[1]; this bug seems to be still in the game as of 2024-01-24