[IC] New Crobuzon & the World Beyond

[GM Marvel]

Simon will mention that everyone should try to stay 5' away from them or be possibly diseased.  Hold your breath and try to avoid it's claws.

[[Lulz, Selina dun play da.]]

[OoC: The suffocation rules aren't particularly clear in 3.5e.  The SRD says you can hold your breath for 2 rounds per point of Constitution. After this period of time, the character must make a DC 10 Constitution check in order to continue holding her breath. The save must be repeated each round, with the DC increasing by +1 for each previous success.

Stormwrack says you can only hold your breath for a number of rounds equal to your Constitution.  But then says to check out the rules for Suffocation on page 304 of the DMG which says it's 2 rounds per point of Constitution.

The Swim SRD says, You can hold your breath for a number of rounds equal to twice your Constitution score, but only if you do nothing other than take move actions or free actions. If you take a standard action or a full-round action (such as making an attack), the remainder of the duration for which you can hold your breath is reduced by 1 round. (Effectively, a character in combat can hold his or her breath only half as long as normal.) After that period of time, you must make a DC 10 Constitution check every round to continue holding your breath. Each round, the DC for that check increases by 1. If you fail the Constitution check, you begin to drown.

SO...

This is what I think makes the most sense. 

* If you don't have time to actively take a breath then it's 1 round per point of Constitution if you do nothing other than move or take Free actions. [see taking standard or a full-round action found below]

* If you do have time to take a breath then it's 2 rounds per point of Constitution if you do nothing other than move or take free actions. [see taking standard or a full-round action found below]

* But If you take a standard action or a full-round action (such as making an attack), the remainder of the duration for which you can hold your breath is reduced by 1 round.

* After that period of time, you must make a DC 10 Constitution check every round to continue holding your breath. Each round, the DC for that check increases by 1. If you fail the Constitution check, you begin to drown.