Undead only?

[lauvhk]

1. The first possible place to find Black Knights is the seaside tavern where you pick up the quest to retrieve a dragon fang. Once you finish his quest, there is one random level 4 creatures available for hire. The number of hirelings is rather limited though and since it is random, there is no guarantee you will definitely find Black Knights.

2. On Freedom Island, there is a vendor called Moon Ghost. It sells random undead units. Never find anything beyond level 3 though, not even Vampire.

3. In Arden Peaks, the Dwarven Necromancer sells undead units. The best I find is Ancient Vampires.

4. In Demonis, the black tower on the upper floating platform sells undead units. The only fixed unit is Necromancer. 10 out of 10 times they are available for sale. The other slots are random.

5. All Haunted ships sell undead units. Nothing impressive for those in Darion/Freedom Islands.

6. Killed the Furious Paladin by destroying all 12 Statues in Marshan Swamp. He will then sell undead units instead of human one. Nothing impressive though most of the time.