Blasphemous Incantation is a tier 3 talent, so is Psy Rating. The two talents cost the same and they both up the character's psy rating by one, but here are the differences:
- Blasphemous Incantation takes an extra half action to use and powers that are activated with a reaction cannot benefit from it.
- The character using Blasphemous Incantation suffers a +20 to any Psychic Phenomena rolls made as a result of the power used with it.
- A roll of 91-00 when using Blasphemous Incantation automatically means the character must roll on Perils of the Warp.
By contrast, upping your Psy Rating doesn't come with any baggage. If your character is dedicated to Tzeentch, Blasphemous Incantation becomes a little cheaper than upping Psy Rating and that is the only reason I could see anyone considering picking up this power. Or maybe role-playing reasons.
There are some very astute people on these boards, so can anyone see something I am missing? Blasphemous Incantation doesn't seem like a very useful talent, especially one of Tier 3 rank.