If you gave every Cosmere character a rock, what do you think each of them would do? How about a banana? or an AK-47? Or a burrito shaped like South Africa?
This is the scenario: you pop out of nowhere, hand it to them, say, "This is important, use it wisely", then leave.
(and no, I do not know why or how the burrito is shaped like South Africa)
I have read lots of stuff. Brandon is my favourite author. The only thing I have not read in the Cosmere is Warbreaker.