Essence of theGraveyard Wizard

Osteokinesis - the ability to physically manipulate bones: move them, shape them, even grow them. You can even manipulate bones inside other people, but you need close contact or some sort of mark for it to work, and a lot of focus.

Osteomancy - the ability to use bones in acts of divination. You can gather information using bones, and you have a special sense that provides information about bones around you and their current state, unless obscured by magical (or similar) means.

Ghostly Remains - you can summon ghostly bones and manipulate them. You control how they interact with the world and how physical they are. They can be used to ignore physical defenses, deal necrotic damage, cause exhaustion of energy, or to mark someone else's bones with a touch.

Bone Trinkets - you can siphon a kind of energy (mortis essence) from different bones and objects made from them to apply beneficial or negative effects on yourself or someone you have marked. Bones from different creatures, parts, and degrees of processing have different effects.

You can drain your own bones, but doing so weakens them and takes time to replenish their power. Other bones used this way become emptied, then weaker, and finally turn into bonemeal.

Gravestep - you can use bones around you to instantly change position with them, but it only works on dead physical bones. It also works on bonemeal - specifically on each grain. It feels cold to do.

Sourcing - you can replenish your magic by killing or witnessing death. You become stronger and can restore powers in places drenched in death or strongly associated with the dead, as recognized by the local population or creatures in the area.

You gain more from killing or witnessing the death of someone who resists death or being killed. You also gain more from sleeping or meditating in places associated with the dead. Different creatures, types of death, and locations influence your replenishment.

You cannot accumulate too much mortis essence, as it makes you more vulnerable to death: stopping bleeding takes longer, severe wounds are more likely to cause death, you get ill more easily, etc.

You are talented in learning magic related to death or the dead, such as necromancy, and great at learning skills related to burial or interaction with dead bodies, like embalming or taxidermy.