You touch a willing creature and choose a damage type: Acid, Bludgeoning, Cold, Fire, Lightning, Necrotic, Piercing, Poison, Radiant, Slashing, or Thunder. When the creature takes damage of the chosen type before the spell ends, the creature reduces the total damage taken by 1d4. A creature can benefit from this spell only once per turn.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.