You have reached the pinnacle of Necromancy and transformed yourself into a lich. Through a vile ritual and a guillotine, you have severed your own head to act as your spirit jar, allowing you to see without eyes. Liches of your kind are known as dullahans or headless horsemen. You gain the following benefits in addition to those of your ValdaSpire24 feature.
Skull Jar
Your spirit jar is your own magically preserved head. Even without your head, your senses aren't inhibited. You can see and hear from where your head once was and your disembodied voice booms from the stub of your neck.
Blindsight
If you are carrying your skull jar, you have Blindsight with a range of 120 feet.
Damage Resistance
You and your mount have Resistance to Bludgeoning, Piercing, and Slashing damage.
Nightmare
When you perform your ValdaSpire24 ritual, you can summon a Nightmare. You command this creature as your thrall and it counts as Undead for the purpose of your Necromancer features. In combat, it functions as an independent mount while you ride it (as defined in the rules on mounted combat).