This looks really solid to me. For two mana more than timber wolf you get
- Comparable, perhaps slightly weaker, attack (1 fewer dice, plus 9+ bleed)
- Familiar with 1 mana per turn and a good selection of spells
The fact he's got access to battle orders is a nice touch as it means he's never useless: presumably he can cast those even if he 'readies' another spell, too, so you don't lose so much if he choose to ready something and the opportunity to use it is lost. It also means that you don't have to worry so much about running out of mana if you combine him and other spawnpoints.
I'm interested by 'his controlling warlord's battle orders'. Not sure whether to read this as implying the new Warlord also has (different? the same?) battle orders, or whether he doesn't: if it's the latter, this card could be a nice way to make the current warlord more attractive to play rather than everyone switching to the new one. Cards that play off vet tokens could do the same. Thematically that could make sense too, as it creates a stronger synergy between the Orc Warlord and the Orc Sergeant than the Dwarf Warlord and Orc Sergeant.