Shadow novice
Shadow novice comes from native folk where Umbra runs strong. They are coreless like all the Hallow's natives. A kingdom recruits them through its Barracks for geld, a little mana and people.
No native has a Seal-shard, and only a shard can cast a spell. So what they throw in battle is not a spell. The Sealborn say the novices carry their lord's affinity in their hands, learned slowly at the lord's side. That is why training them takes longer than drilling a soldier.
The first thing they are taught is the lesson every cultivator of Deep Hand inherits from Odrin Half-Core: the dead do not walk for free. A novice who serves a Umbra lord sees that price paid in the kingdom's own people.
On the field they are quick and strike true. They are kept on geld and a little mana, and they can be sent home.