Honestly, ideally, you should customize the "Fatal Channeling Projections" (either I, II, or III) to your own "culture, background, deity served, etc.", though I guess it's a bit hard, as there's not guidelines about how weak or powerful such spells should be.
As such, it may be interesting for GMs to use this thread to share their own, customized versions of this spell, at I, II and III ranks.