1. 0-2 moths will spawn. It spawns two (as it should) for a good majority of the time, but it will spawn one very frequently and none if you throw it far enough. 2. Incompatibility with fragments. I haven't seen Mothkeepers work with facet of dominance. And I have seen some people having issues with it working with facet of mending. 3. This also hasnt happened to me but I've heard some people say that mothkeepers does not generate light transcendence energy