|Niilo John Van Steinburg|
Acid Breath: Undines whose outsider heritage can be traced to a water mephit can wield acid as a weapon. Such an undine has a breath weapon that is a 5-foot cone of acidic water usable once per day. The breath deals 1d8 points of acid damage per two character levels (maximum 5d8). A Reflex saving throw (DC 10 + 1/2 the undine's level + the undine's Constitution modifier) halves the damage. This racial trait replaces the spell-like ability racial trait.
Taken literally, a 1st-level undine character with this alternate trait has no breath weapon (or just sprays out a cone of non-acidic water - heh). Often effects that are based on a fraction of a level will state something like "minimum 1". I can't think of any effects that don't have that minimum so I'm wondering if this case is an oversight.