What is this?

Stem the Vermintide is a 24-hour D&D event to raise money for BC Children's Hospital. It is organized by Jeremy Vernon as part of the Extra Life charity fundraising event. This year, Jeremy will be hosting an in-person table of players in a 12-hour adventure on Saturday, November 5th. On Sunday, Jeremy will DM a group of intrepid adventurers on a 12-hour real play stream!

How can I participate?