Hi Tom,
A rules question I couldn't for the life of me find an answer to: Does using a blasphemy in a conflict scene always require an action, even when the power does not roll PSYCHE or (directly) affect a talisman?
On page 43 it says that players can perform an action once on their turn, which includes anything involving one of the courses of action (like Act, Defend, and the others listed). This would mean anything that helps on the fight/conflict, including the use of blasphemies for those objectives (wheter it be setting up an ally, using objects, assess the situation for advantages, etc).