According to the Fiendish Darkness feat in Blood of Fiends:
Fiendish Darkness
You can use your darkness spell-like ability more often.
Prerequisites: Darkness spell-like ability, tiefling.
Benefit: You can use darkness three times per day as a
spell-like ability.
Normal: You can use darkness once a day as a spell-like ability.
However, I am building a Rakshasa Heritage Tiefling with the spell-like ability to use Detect Thoughts instead of Darkness once a day. Is there any precedence for using this feat to grant Heritage SLA's 3/day also?
