Landwalker
( Races of Faerun, p. 166)[Racial]
You can survive out of water for a longer period of time than most of your kind.
Prerequisite
Aquatic elf,
Benefit
You can survive out of water for 3 hours per point of Constitution. After this point you must make a Fortitude saving throw each hour (DC 15, +1 for each previous check) or you begin to suffocate.
Normal
Aquatic elves can survive out of water for one hour per point of Constitution; after this point they begin to suffocate (see Chapter 3 of the DUNGEON MASTER'S Guide).