BALLS OF STEEL!

*Look upon 1 male creature within 60ft of you, yell out in a booming voice* "BALLS OF STEEL!" The target must make a strength saving throw or have their balls turn into solid steel gaining a +1 to AC, but takes a level of exhaustion. The target can attempt to break the spell at the end of their turn every round or until the spell is ended. When cast at lv 4 or higher, add another level of exhaustion and point of AC for every level above 3rd.

Alternatively, per spell slot above 3, you may choose additional targets equal to the spell level. Additionally, deal only 1 additional lv of exhaustion regardless of spell level cast at, and the normal amount of added points of AC equal to the spell level. 

After the spell has ended, for the next 12 hours, the target's suffer a -1 to all strength based checks.