A QUATERN is a sixteen line French form composed of four quatrains. It is similar to the kyrielle and the retourne poetic forms, in that it has a refrain (repeated line). The refrain line is in a different place in each quatrain. The first line of stanza one is also the second line of stanza two, the third line of stanza three, and the fourth line of stanza four. A classic quatern has eight syllables per line, and it does not have to have any set meter or rhyme scheme. You can however adapt either of these, as long as the refrain cascades down through the four quatrains (stanzas). — Example here: https://theprose.com/post/739999/not-quite-sleeping — (Please tag me in the comments of your entry)

The OTTAVA RIMA (rhyme of eight) is an old Italian poetry form, dating back to the 13th century. The form is fairly simple, and consists of 8-line verses (or octaves). For this challenge, each line should be made of 8 syllables, with a verse rhyme scheme of: [a b a b a b c c]. (For the purists, you can use iambic tetrameter, but any 8 syllables will work). Create as many octaves as you wish. — Example here: https://theprose.com/post/737881/morning-flight — (Please tag me in the comments of your entry)

The AWDL GYWYDD (OW-dull GOW-with) is an old Welsh poetry form that combines simple syllable counts, with internally linked rhymes. Each verse is built of four 7-syllable lines, with a rhyme scheme of a, (a)b, c, (c)b. The internal rhyme can occur on syllable 3 or 4. - Here is a sample: https://theprose.com/post/182706/sweet-recollections (Please tag me in the comments of your entry)

The VIRELAI is an old French form that combines a simple rhyme scheme with strict syllable counts. It is a 9 line poem form with syllable counts of 5, 5, 2, 5, 5, 2, 5, 5, 2 -- and a simple rhyme pattern of a, a, b, a, a, b, a, a, b. - Here is a sample: https://theprose.com/post/722014/coulrophobia-fear-of-clowns

Most creative entry wins a huge smile, and the runners up all get dream unicorns. <and NO fighting over the unicorns!> - Make sure you tag me. :)