Cow teeth that I occasionally use for spirit work.
I feel like some materials that are commonly used in other paths are often overlooked by death witches. For example:
Bloodstone is not often mentioned, but has incredible potential for death work. It represents blood flow in the human body, and therefore can be used in spells in the same vein as actual blood is used. I mainly use it to connect to ancestors, but you may also use it for grounding, protection, and energy work.
Ground eggshells have potential in the craft; they represent death of a conceived chick, and the protection of new life. It can be used in place of salt if you’re scattering it around plants, as it won’t harm the surrounding nature. You can even make a black salt out of it by grinding it with ash or charcoal, or dying the egg before the grinding it.
Banana bread can technically be a good offering, since it uses brown bananas oftentimes. Bread is also a common offering for the dead.
Many witches recommend harvesting plants when they’re still alive. For death witchcraft, there may be more power in harvesting dead plants. For example, fallen eucalyptus leaves would make a fine addition to any protection powder against malevolent spirits, due to its association with both protection and death.
Sea shells and snail shells are traditionally common in bone throwing for representing the bones of the sea and the bones of the earth, respectively. If you don’t have actual bones on you, these would make a nice substitute.
Although blood is often recommended for linking yourself to a spell, you may also use nail clippings, hair, saliva, or even tears.
Paper clips are an accessible, cheap source of steel, which is mainly iron. A great ingredient in protection spells.
Dawn is a great time to work with beginnings and afterlife, while dusk has potential for spells about endings.
Dirt from crossroads or the gate of a cemetery helps one connect to spirits, and cross over into the afterlife.
Don’t want to use bones? Use nail clippings, talons, teeth, or even snakeskin or furs.
These are simply ideas. Hopefully, these suggestions expand your knowledge and creativity surrounding death witchcraft.