User blog comment:WillTest1/Voda, the Striking Wave/@comment-7481207-20141216213933

The problem with interacting with the riveers on Summoner's Rift, is that they are exclusive to that map. He effectively has no ultimate on other maps, and while he can still return to base to refresh his water, doing so often is really bad, especially on Howling Abyss where you otherwise have no reason to do so and no Recall.