To me it sounds like you keep a wound tracker for the unit. Say a unit us 5 Health. Each time the unit has suffered 5 damage you take a model.
say a unit suffers 10 damage - you take 2 models of your choosing.
say the unit takes 3 damage in shooting and 3 in combat - you take a model in combat and when that unit takes 4 more damage you take another model.
Spend 1 CP to charge an Opponent’s screen in their turn. Then at the end of the phase spend 2 CP to get past the screen so at the beginning of your next turn you can move and charge something else.
This reminds me of Conquest’s army building scheme. Each Hero has a Warband with a limited number of units they can take and from a specific unit pool of units (Spire Nobles can take Avatars and Elite stuff, Biomancers take drones and the bodyhorror monsters, etcetc).
The Crone Herald’s Army of Renown is going to be a little weird. It looks like the only units I would think she gets are the Non-Morathi/Melusai/Harpy units.
*Witch Aelves
* Sisters of Slaughter
*Hag Queen/Slaughter Queen
* Cauldrons of Blood
*Doomfire Warlocks
*Maybe the Shadeborn/Shadowstalkers
Avatar of Khaine debatable