Necromancy Expert

Very familiar with necromancy magic in particular, you gain the following benefits.

• The gold and time you must spend to scribe a spell scroll of a necromancy spell, as well as to copy a necromancy spell into your spellbook, ritual book, or Book of Shadows, is halved if it isn't already.
• You have advantage on saving throws against necromancy spells, as well as on Intelligence (arcana) checks made to recognize a necromancy spell or its effect.
• When you reduce a humanoid to 0 hit points with a necromancy spell, you can choose for its spirit to immediately rise as a specter under your control. Roll initiative for the specter, which has its own turns. It obeys your verbal commands and remains into your service until the start of your next short or long rest, at which point it vanishes to the afterlife. Once you use this feature, you must finish a short or long rest before you can use it again.