Oni's Resolve

3rd-level transmutation

Casting Time: 1 action

Range: Self

Components: V, S, M (a drop of oni blood)

Duration: Concentration, up to 10 minutes

You draw upon the legendary resilience of the oni, increasing your Constitution by 2 for the duration. You gain temporary hit points equal to twice your level and have advantage on Constitution saving throws, including those to maintain concentration on spells.