Cloud of Sleep

You enchant an area to inure creatures which enter it to fall into magical slumber, coating it with an thin invisible cloud.

Roll 20d8 when you cast this spell; creatures which end their turn within the area with hit points equal to or less than the number rolled are affected. Each creature affected by this spell falls unconscious until the spell ends, until the sleeper takes damage, or until someone uses an action to shake or slap the sleeper awake.

Undead and creatures immune to being charmed aren’t affected by this spell.

When you cast this spell in the same location every 7 days for 1 year it lasts until dispelled.

(inspired by Phezult's Sleep of Ages from 2e)