Choose any creature that you can see within range. The target must succeed on a constitution saving throw or be paralyzed for the duration.  At the end of its turn the target can make another constitution saving throw, on fail the target falls unconscious until spell ends. When unconscious the creature can still make constitution saving throws at the end of its turn but in disadvantage. On a successful saving throw the spell ends and the creature wakes up at the end of its next turn.

when cast on level 6-7 you can target one additional target

 when cast on level 8-9 can target another additional target