Imcomplete route:
*To succeed in this check, the MC must have a working lantern, [40 Bright Mind or higher], and [10 Razor Wits or higher] to find Gree's ring in the burial mound.
They will also need to have varying levels of both Health and Physique to hold their breath long enough for the spell to work.
*Surviving the cliff (and not meeting Mekduk) requires a physique of 50 or higher and to be using a lantern, which you should buy prior to arriving at the Reach.