Delicious Pain
Prerequisites 4th
You gain the following benefits.
Ability Score Increase. Increase one ability score of your choice by 1, to a maximum of 20.
Toughened Flesh. Immediately after you take Bludgeoning, Piercing, or Slashing damage, you can take a Reaction to gain Resistance to Bludgeoning, Piercing, and Slashing damage until the start of your next turn. Once you use this benefit, you can’t use it again until you finish a Short or Long Rest.
Sources
Astarion’s Book of Hungers p. 9