Have your entrants write the best limeraiku.

What's a limeraiku? It's two haiku that combine into a limerick. It's best to show by example:

Spring turns to Summer
unceasing; I lie awake
without sleeping. It’s

Not just the moans, it’s
dry rat’tling bones! Again, the
zombies and streaking.

Little known fact: a streaking zombie is, in fact, just a walking skeleton.