Fate-Reavers can cast spells at Tier 1. The relevant text is below:
“In addition to the Steal Fate feature, you gain the ability to learn and cast basic and complex Faith spells. If your religion allows you access to the Fate and/or Chaos spheres, you may learn and cast basic spells from those spheres as well. You may only learn and cast these spells while under the divine influence of an Icon of Deception spell.”
"The End to War, the End to Pain,
these will come in Seventh's reign"