Suffocation

When a creature’s body is deprived of oxygen, its brain starts shutting off. That’s generally considered bad. If you can’t breathe, you can hold your breath one minute for each point of Endurance you possess (thirty seconds per point if performing strenuous activity such as swimming or underwater combat). After this length of time, you quickly black out and asphyxiate. You gain the suffocating condition so long as you go without air.

The suffocating condition (see below) causes Stamina Drain (DL 15; +1 every round; lethal). The lack of oxygen to the brain pulls a creature into a permanent slumber. If you can't take in a breath and you receive a sixth Death Mark, you turn an odd shade of blue and die, grasping at your throat, probably.

If you regain the ability to breathe, you lose the suffocating condition and release a single Death Mark. Any remaining Death Marks imposed by that pesky hypoxia can be released one a time per restful night of sleep.