Transfix

The Vampire is so beautiful that mere mortals will to
fight immediately disappears before her.
At the beginning of the Close Combat phase, one model in base contact with the Vampire model must take a Leadership test. If the test is failed. the victim cannot attack in that Close Combat phase.

Models which are Immune to Psychology (frenzied, unbreakable, etc) are immune to these powers.
If a Lahmiah Vampire has more than one of these powers, the selected level must take a test for the most expensive 
power first the test is passed, the selected model must take the next most expensive test, and so on. If the test is
Failed the model will be affected by the power and the vampire can choose another model in base contact to take the next most expensive test, and so on. It follows that a model cannot be affected by more than one of these powers at the same time if a model is in base contact with more than one Vampire only one Vampire can use any of these powers against him in each turn (Lahmiahs are a Jealous lot)
In the case of chariots, ridden monster/chariotsns and similar models, take the test using the best leadership value available. If the test is failed, the result will affect the entire model (crew steeds. monster and riding character). Impact hits are applied before these tests are taken.
Challenges are issued and accepted before these tests, and if the Vampire is involved in a challenge she can only use these powers on her own turn. In this case a chariot's crew and steeds would be allowed to exchange blows with the vampires unit, even if the character riding in the chariot has been seduced, dominated. etc.