From The Heroes of Might and Magic III wiki

[edit] Biography

Orphaned as a child, Thorgrim was raised in the northernmost forests of AvLee. He became known throughout the land for his exceptional ability to resist magics of all kinds.

[edit] Special Ability

Resistance- Thorgrim receives a 5% bonus per level to his Resistance skill.

[edit] Secondary Skills

Advanced Resistance

[edit] Additional Information

Class: Ranger

Gender: Male

Species: Dwarf

Comments: Extremely deadly against spellcasting heroes that rely on direct damage spells or debuffs. Battle Dwarfs under Thorgrim's command mostly become immune to magic, making them a tough nut to crack.