In this article I will consider the general development of Welsh narrative charms from the earliest examples (late fourteenth century) up to the first decades of the Early Modern Era in Wales (mid-to-late sixteenth century). I will focus on the most common narrative charm types of this time: those that feature the motifs of Longinus, the Three Good Brothers, and Flum Jordan or Christ’s birth in Bethlehem. The development of these charms over time can provide insights into changing attitudes in Wales towards healing, religion, superstition, and even language. By the onset of the Early Modern era, Welsh narrative charms were increasingly subject to rhetorical expansions of the religious narratives that constituted the efficacious component of the charm. Additionally, by the end of the fifteenth century and into the early sixteenth, charms that once commonly featured Latin as the predominant language demonstrated an increased preference for the vernacular.