The target takes poison damage now,
and must pass a health save, or take ongoing poison damage at the start of each of its turns.
Poisoning from this spell lasts until ended or treated.

Ongoing poison damage you inflict with this spell does not stack (but each caster of this spell may apply it once to the same target).

Affected creatures may spend an action to attempt a DC 13 health save to end all ongoing poison damage from this ability on themselves.

Track your ongoing damage, and remind your Headmaster about it at the start of each affected creature’s turn.

Damage Boosts:
Unless otherwise specified, damage boosts only add to the up-front damage of this spell, not its ongoing damage.

Intensify:
Intensify applies to both the up-front and ongoing damage, but only lasts for one round. You may continue intensifying this spell as an action using Intensity Boost.

Target must pass a health save, or take poison damage.

Cantrip:
You cannot Intensify this spell.