So in my current campaign the characters are caught up in a gods war and one of the pcs is being sent to the Elemental Plane of Earth to renew the Dwarven Pact of Stone. Essentially this is a pact the Dwarves have had for time immemorial to give them an affinity with the deep places of the earth. But in recent millennia the Dwarves have come to take the pact for granted and become poor wardens of the stone and some of the special affinity they had in the early days of their race has waned. With the gods war on top of them the Dwarven allfather wants to renew the pact but I'm curious what the manifestations of stone are going to ask of them.
What the Dwarves get out of this deal: Greater affinity with stone; they can navigate it faster and more accurately; they can shape it through ritual; they take less damage from stone; they can speak with stone; they can pass-stone via ritual; stone-sight; other various narrative stone affinity.
But what do they give in turn? Ideas?