Oh! Farid brought back the Djinns after the battle – it was the Battle for Glory map. Apparently, not every map supports certain abilities.

Hmm. I figured out Lilith's ability. It wasn't entirely obvious from the spell description in the book, but there's a paradox. If Lilith successfully seduces a unit, she loses movement points – the idea is that each seduction costs movement points. This means she can only seduce the remaining units as long as they meet the requirements and as long as it's not the last unit.