You suggest a course of activity (described in no more than 25 words) to twelve or fewer creatures you can see within range that can hear and understand you. The suggestion must sound achievable and not involve anything that would obviously deal damage to any of the targets or their allies. For example, you could say, “Walk to the village down that road, and help the villagers there harvest crops until sunset.” Or you could say, “Now is not the time for violence. Drop your weapons, and dance! Stop in an hour.” Each target must succeed on a Wisdom saving throw or have the Charmed condition for the duration or until you or your allies deal damage to the target. Each Charmed target pursues the suggestion to the best of its ability. The suggested activity can continue for the entire duration, but if the suggested activity can be completed in a shorter time, the spell ends for a target upon completing it. Using a Higher-Level Spell Slot. The duration is longer with a spell slot of level 7 (10 days), 8 (30 days), or 9 (366 days).
RollQuest summary Duration scales by slot.
SRD 5.2.1, p.148 · CC BY 4.0
Try this spell in RollQuest
Cast Mass Suggestion on a real battle map. Pick a caster and a target and RollQuest plays the effect for everyone at the table. Free to start.
Make a caster for Mass Suggestion in our free DnD character creator
The builder walks you through class, species, ability scores and spells, then you cast Mass Suggestion straight from the sheet. RollQuest rolls the dice with your spellcasting modifier, posts the total in chat for the table and keeps count of your spell slots. Try the DnD character creator, for 5e and 5.5e.