Bark of the First Trunk (Resistance)

You touch one willing creature. The target’s skin flickers with deep, ancient bark texture. Their shadow stretches upward into branching patterns. Once before the spell ends, the target can roll a d4 and add the number rolled to one saving throw of its choice: Acid, Bludgeoning, Cold, Fire, Lightning, Necrotic, Piercing, Poison, Radiant, Slashing, or Thunder. It can roll the die before or after making the saving throw. The spell then ends.