Start with 3d6 x10 wealth
Takes a first level spell slot to control an undead.
At every 5 levels you can choose to be able to summon 3 addinal zombies but only get less more health, or get more more health but less zombies.
You can control a zombie a hit dice, costing 2 hitpoints each for a basic zombie. The more powerful the zombie the more hit points, but that will be worked out later.
You can only control a certain amount of zombies per caster level, TBD.
IT goes normal~semi powerful~powerful
Control undead horde is a temporary spell, controls a lot of undead, TBD for a TBD time.