If you are searching for synonyms for the phrase "ripples a pond," then you might consider terms like "stirs the waters," "disturbs the surface," "creates gentle waves," or "causes undulations." These phrases all evoke the image of something disrupting the stillness of a body of water and sending out concentric circles of motion. Other options might include "makes a splash," "sets off a chain reaction," "causes a commotion," or "sparks a series of events." Regardless of the phrasing you choose, the idea is to capture the idea of one action having a profound and far-reaching impact, much like a pebble being thrown into the water.