[Vynd]

The Behemoth spell actually only requires 3 Death magic. Dusk Elders can cast it without any help. Now it is at the fourth level of Conjuration magic, but that doesn't affect who can cast it. Once you've researched a spell level, anyone with the appropriate magic skills can cast it.

The Wraith Sword is a Death magic item that you get access to at Construction level 4. It's a two handed-sword that drains life when you hit with it, making it very popular to give to powerful fighters. At Construction level 6 you can make Bone Armor (drains life from surrounding units) and Wraith Crowns (makes the wearer ethereal and summons a bunch of skeletons at the beginning of a battle). There are also quite a lot of Death artifact weapons.