Testicular Torsion!

This spell selects one target, target must make a DC 15 constitution saving throw. Upon an success the target will not recieve any effects. Upon a failure the Target will recieve 2d12+4 Force damage, be knocked prone, and have his movement speed reduced to half. 

In order to use the spell the user must yell out its name for the full effect. 

Spell does not work on females on any race. Spell will only function If the male of that race has testicles.