Undead Rapport

This spell is from the Dark Souls spell collection.

You offer comforting words and a warm flame to an undead creature you can see within range. The target must succeed on a Wisdom saving throw or become charmed and under your control on its next turn. The DM determines to what extent the target obeys your command. The spell automatically ends if you cast it again.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the duration increases by 1 round for each slot level above 2nd. On each of the target's additional turns, it may make another Wisdom saving throw to end the spell.