In the config for Soul Shards there is an option for setting how many kills between tiers for filling up the soul shards, but I haven't been able to figure out how that works. I wanted to play with them in a test world before setting out on hunting trips so I set the number of kills down to 20 and started a fresh flat world to test it out in. My first tier showed up at 64, which is the unchanged rate listed in the Soul Shards thread at the Minecraft forum. I tried changing the number to 2000 and got the same results. Has anyone else tried altering the kills per tier, or have an idea how the config should be set up?