Essence Instability
Creatures affected by the aura must make a successful Constitution saving throw each round to negate the damage. The aura moves with the original target and is unaffected by [gust of wind](https://api.open5e.com/spells/gust-of-wind) and similar spells.
The aura does not detect as magical or poison, and is invisible, odorless, and intangible (though the spell’s presence can be detected on the original target). [Protection from poison](https://api.open5e.com/spells/protection-from-poison) negates the spell’s effects on targets but will not dispel the aura. A foot of metal or stone, two inches of lead, or a force effect such as [mage armor](https://api.open5e.com/spells/mage-armor) or [wall of force](https://api.open5e.com/spells/wall-of-force) will block it.