The School of Thanomancy teaches necromancy generally, but leans hard towards controlling undead minions.
Choose two Wizard spells from the Necromancy school, each of which must be no higher than level 2, and add them to your spellbook for free.
In addition, whenever you gain access to a new level of spell slots in this class, you can add one Wizard spell from the Necromancy school to your spellbook for free. The chosen spell must be of a level for which you have spell slots.
While you have Temporary Hit Points you are Immune to Necrotic damage and magical sleep, and your Hit Point maximum cannot be reduced.
Additionally, you know the Chill Touch cantrip, it does not count against your number of cantrips known, and you can cast it without spell components. When you cast it you may add your Intelligence modifier to the damage roll, and you gain Temporary Hit Points equal to the Necrotic damage taken by the target.
You gain your choice of one of the following options.
*Raiser of the Dead. You always have the Animate Dead spell prepared, and it does not count against your prepared spells limit. Additionally, you can cast Animate Dead as a Magic action but if you do so, after 10 minutes each creature that remains animated returns to its previous state as a pile of bones or a corpse.
*Summoner of the Dead. You always have the Summon Undead spell prepared, it does not count against your prepared spells limit, and you can cast it without Material components. Additionally, when you cast Summon Undead you can modify it so that it does not require Concentration. If you do, the spell's duration becomes 1 minute for that casting, and when summoned the Undead Spirit has a number of Temporary Hit Points equal to your Wizard level plus your Intelligence modifier.
The feature option you previously chose for Adept of Death improves.
*Raiser of the Dead. You always have the Raise Dead and Create Undead spells prepared. Raise Dead is a Wizard spell for you, and neither spell counts against your prepared spells limit. You can cast one but not both spells without a spell slot and without Material components once per Long Rest.
*Summoner of the Dead. When you cast Summon Undead, it is resolved as if it is being cast using a spell slot one level higher than it actually is. Also, you can cast Summon Undead without a spell slot once per Short Rest.
At the start of each of your turns you may choose an Undead creature within 120 feet of yourself that is under your control or takes orders from you, and then spend and roll one or more of your remaining Hit Dice. The chosen creature gains Temporary Hit Points equal to the total, and can use your Proficiency Bonus instead of their own until they have no Temporary Hit Points remaining, or you finish a Long Rest, or you die, or they die.
You always have the Finger of Death spell prepared and it does not count against your limit. You can cast Finger of Death without Verbal components, with a range of 300 feet, and it always deals maximum damage.
Additionally, you can cast Finger of Death without a spell slot once per Long Rest.