Wizard: School of Necromancy

The gold and time you must spend to copy a necromancy spell into your spellbook is halved.

Once per turn, when you kill one or more creatures with a spell of 1st level or higher, you regain hitpoints equal to 2 times the spell's level, or 3 times if it was a necromancy spell. You don't gain this benefit for killing constructs or undead.

You may add the animate dead spell to your spellbook if it is not there already. Whenever you cast animate dead, you may target one additional corpse or pile of bones, creating another zombie or skeleton as appropriate. Additonally, whenever you create an undead using a necromancy spell, the creature's hitpoint maximum is increased by an amount equal to your wizard level, and the creature may add your proficiency bonus to its weapon damage rolls.

You gain resistance to necrotic damage, and your hitpoint maximum cannot be reduced.

As an action, you may choose 1 undead that you can see within 60ft. of you. That creature must succeed on a CHA saving throw against your wizard spell save DC. On a failure, it becomes friendly to you, and obeys your commands until you use this feature again. On a success, you cannot use this feature on that creature again. Intelligent undead are harder to control in this way. If the target has an INT score of 8 or higher, it gains advantage on the saving throw. If the target has an INT score of 12 or higher, it may repeat the saving throw at the end of every hour, ending the effect on itself on a success.