New skill: Tsunami walk.
By stomping a well-trained foot a master of tsunami invocation can fairly
easily create a tsunami-generating local earthquake. Combined with water
walking capability (or good swimming skill or a raft or whatever) this tsunami
can be used for the fastest non-magical transportation by sea known to man (a
tsunami goeas as fast as 900 km/h or so?). Traveling between continents would
just take seconds.