The Mirthful Glens is a light poetic form intended to express pleasure with the human deity Egesh originally devised by the human Busbel Shortworks. The form guides poets during improvised performances. The poem is a single tercet. Use of vivid imagery is characteristic of the form. Each line has nine syllables. The third line of the tercet reverses the grammatical structure of the second line. The third line of the tercet must expand the idea of the second line. The first line must make use of epenthesis. It has an initial caesura.