Couplets

You channel the mischievous spirit of William the Spear Shaker, one of the greatest bards of all time. 

Point to a creature and shout the command.

They must succeed, else be cursed to withstand

a WIS saving throw and be burdened with rhymes

til the end of your focus/duration of time.

Creatures immune to becoming a-charmed

will always succeed, so be on your guard.

At Higher Levels. The spell is advanced.

Slots level 3 or above make it last

an hour or longer per two levels high,

until 4 hours long at slot number 9.

If you're confused, just follow this chart!

I hope that it helps. I mean it, a lot.