I just unlocked Necromancer, I figured others may want to know what it is. Perhaps others could post about the other classes to keep this consolidated before the wiki gets updated.
- Longevity: The Hero gains +8 Life (10 victories required)
- Deadly Power: The Hero gains +2 Magic (25 victories required)
- Unlife: The Hero counts as Undead for Team Bonuses (50 victories required)
- Undead Bond: Allied Undead gain 2 Life (18 Minor Magic Traitstone, 10 Runic Magic Traitstone, 10 Runic Water Traitstone)
- Magic Spirit: Gain 1 Magic for each Purple ally (26 Minor Magic Traitstone, 12 Major Magic Traitstone, 10 Arcane Spirit Traitstone)
- Ensoul: Gain an extra Soul on 4 or 5 Gem matches (???)
- +1 Blue gem mastery
- Counts as Khetar troop for team bonuses (Activates at Level 10)
- +1 Magic when using purple weapons
Special class weapon:
- Creeping Death: Place Deathmark on the strongest and weakest enemies and deal 6 damage to all enemies.