The rules for suffocation say that a PC can hold their breath for a number of minutes equal to their toughness bonus. I assume this is for narrative time in situations that involve drowning or dangerous gasses and what not.
In an encounter I am running, our tech priest just got a Gloomhaunt beautifully attached to her head. Now, how do you handle suffocation in this situation? Her TB is 3 and 3 minutes in combat time is... 30 rounds? Yeah, that isn't happening.
Every round that the Gloomhaunt wins an opposed Strength test, it is going to deal 1d10+2, pen 2 damage on the Tech Priest. So, where does the suffocation factor come into play?
How would you, or how have you handled it in the past?