The Undead

Raise Zombie: This allows you to raise up undead minions. They might perform one action per gain, or this might produce creation points for followers. It can also heal creatures that are already dead. You might also rename this so it can produce wights, vampires, or whatever else you see fit.

Conjure Spirit: This allows you to speak with the spirits of the departed and also raise up ghostly minions.

Astral Projection: Your ghost can leave your body even while said body is still alive.

Summon Ancestor: You can call forth the spirit of your forebears to aid you.

Steal Life: You can deal damage to an enemy while healing yourself or an ally. Half or more of your gains are spent dealing damage and the rest are spent healing.

Death's Touch: This spell deals damage and kills things.

Mark of Death: This turns the target partially undead, their rotting visage unnerving others and their dead flesh at war with the living parts. This spell works well when combined with spellcaster upgrades like curse.

Dominate Undead: This allows you to control the undead, granting you greater control of your minions (treat this as the assist action) or controlling enemy undead.

Death's Door: You open up a portal to the realm of the dead, allowing things in... or out.

Possession: This is a spell designed to allow spirits (which normally can't affect physical things) to take over the bodies of the living.

Flesh to Spirit: This turns physical entities into spirits temporarily. It can also turn spirits physical.

Soul Steal: This allows the caster to gather the spirits of the recently deceased. Treat these as trinkets for use in powering future spells or crafting into magic items.

Soul Search: This allows you to sense of all souls in the area, which can be used to detect life that might not be obvious or invisible spirits. It can also be used to get insights into someone's psyche.