This is such a tight gem of material! I have very few notes! If this was expanded out into 16 or 32 pages I would put a physical copy on my shelf and on my game table post-haste!
I appreciate the 'the timer increases each time a 6 is rolled' advancement down the ritual table - I will be borrowing that mechanic for the presence and then arrival of Titanic Beasts of the Land in some of my own games - too much game activity invariably draws the gaze of the great Hoofed One...