This spell is in the Air's Constant Flow spell chain and can be found in the Air's Constant Flow rune stone.

With the creation of this spell, you mix a dark poison with the air that the single target breathes. For three rounds the poison works through the target’s system doing 1d% Vitality poison damage. At the end of the third round, the target passes out. Then the countdown for death begins. At the end of the third round of coma state, sixth round of the spell, the target dies. The target cannot be pulled from this spell as it is in the target’s air and follows the target. Antidotes are ineffective. The only way to end this spell's effects and save the affected target is to kill the caster who created the spell or end the battle. 

Stat Cost: 60 Soul
Casting Speed: 5
Duration: 6 rounds (3 rounds poison, 3 rounds death countdown)
Range & Area: 6 spaces affecting 1 target
Invisible Spell
Success Rate:  45
Max Success Rate:  75