User blog comment:GreenMoriyama/Sauna, the Yordle-Brawler/@comment-7709681-20151219174631/@comment-3391671-20151223003937

The initial kit granted Sauna extended range to her basic attacks, along with causing that basic attack to have a linear AoE zone (similar to Azir's sand soldier's basic attack) to deal % damage and grant rage. Someone below (more specifically Willbach) suggested to grant splash on-hit, so I took that suggestion up.

If my above statement did not answer your question, please ask again as to what I had missed in answering your quesiton.