Airless Zone

summary: Inflicts Choked

When a creature starts their turn touching an Airless Zone or when they touch a Airless Zone for the first time on their turn, the creature gains Persistent Stacks of Choked for each Stack of Airless Zone. The Silenced Condition becomes Fleeting upon leaving the Airless Zone.

As noted in Choked:

A creature can use a Free Action to hold their breath, provided they have no stacks of Choked. As a result: