Specifically it says that the ability is not charged.

Yes, every career ability needs to be charged, they should have a description on the career page under their ability text, as for necromancer i thought he or his party needs to deal X amount of damage, you will see cyan-ish color % numbers pop up

Originally posted by R4MPZY:

Yes, every career ability needs to be charged, they should have a description on the career page under their ability text, as for necromancer i thought he or his party needs to deal X amount of damage, you will see cyan-ish color % numbers pop up

Hello!
I have the same problem : I know it needs to be charged but how do you charge it? I've been playing a necrarch for hours and havn't been able to use his ability in battle yet.

Some career abilities list their charging requirements, some do not. I am currently playing a spellsinger, and there is no mention on the career page of what is required to charge the ability. It never charges when I am by myself, but it does so fairly reliably when I have spellcaster companions (not necessarily spellslingers, any magic seem to do), so I suspect it has something to do with casting magic, and not just any magic (missiles won't do it at all) but specific magic, possibly buffs ?
Anyway, if at some point the devs could update the all the career pages so they all list their requirements, that would be quite nice :)

the harbinger ability is charged by your units dealing damage to the enemy.