As an action, You expel a thick red mist from your mouth, requiring all creatures within 30ft of you must succeed a Constitution (vs Spell save DC) saving throw or else become overwhelmed with Dread. Creatures affected by Dread must make Constitution saving throws each turn, suffering from increasingly dangerous ailments if they fail to recover. While casting this spell, you may also use your bonus action to exclude any amount of targets from this spell's effects. This spell does not effect Undead, constructs, or creatures that are not required to breath. 

For each failed saving throw, increase their level of dread. For each success, reduce their level of dread.