Finally got to play some more Cthulhu, so let’s build on what went down!

Ululation to The High Priest

Cost: 10 magic points; 1D6 Sanity points.
Casting time: 30 minutes
As you finish screaming the words of this spell, you open a small gate to the high priest of the dark gods himself where he offers you the gift  of his own knowledge. Spending 10 magic points give you a bonus die on one Cthulhu mythos roll.
Alternative names: Dark Blessing of Cthulhu,  The Expensive Tutor, The Harsh Mastery