Quote Originally Posted by Greenish View Post
Also makes another argument on why Iron Heart Surge is poorly worded, if you could use it to end an effect that lasts for 11 rounds, but not one that has the listed duration of 1 minute. (Not that I can think of any example for such an effect.)
Here's an actual D&D example: Metabreath Feats, from Draconomicon, page 66:
To take a metabreath feat, a creature must have a breath weapon whose time between breaths is expressed in rounds. Therefore, a hell hound (which can breathe once every 2d4 rounds) can take metabreath feats, whereas a behir (breath weapon usable 1/minute) cannot.
Breath weapon says "once every 10 rounds"? Eligible. Breath weapon that says "once every minute"? Not eligible. Are they the same amount of time? Absolutely! So the game really does make this sort of distinction about units of measurement for durations.