Mark of the Raven Queen

You gain the following benefits:

• You gain advantage on death saving throws.
• You gain resistance to Necrotic damage. 
• You learn Wither and Bloom, which you may cast once per day without expending a spell slot. Wisdom is your Spellcasting modifier for this spell. 
• Whenever you reduce a creature to 0 hit points, you gain temporary hit points equal to your level. This does not stack.