This weekend, adventurers will gather for Dungeons & Donations 2, the second Dungeons & Dragons marathon for charity. Participants will be able to buy their way into the game for $5, and play until their character dies. After that, it’s $10 to continue, $20 the next time, and so on.

The event, held at The Wyvern’s Tale Games and Sundry Friday and Saturday, Dec. 11 and 12, raises money for Extra Life. The charity is a partner of the Children’s Miracle Network and its hospitals. All donated proceeds will be used to help fund medical research, purchase life-saving hospital equipment and alleviate some of the cost of care for sick children.

Spectators at the game are encouraged to contribute to Extra Life, too, by way of monetary donations to either help or hinder the players. “Even if you cant show up, tune in to Twitch.tv,” says Deklan Green, who works at The Wyvern’s Tale. Donations (and game-changing suggestions) can be made through that online platform.

Green is a major contributor to the organization and execution of the marathon. He looks forward to the event. “Last year we raised over $2,000; we’re hoping to beat that this year,” he says. “We’ve had a lot of people talking about it and showing their interest.”

This year, adventurers will be challenged by The Keep on the Boarderlands, a classic story by Dungeons & Dragons creator Gary Gygax. “It used to be the one everyone started with in the basic starter set in the ’80s, so I think there are a lot of people who will have a lot of nostalgia for it,” says Green. The tabletop role-playing game was first introduced in the mid-’70s. In it, characters — created by the players — undertake adventures in a fantasy word.

But Green encourages the uninitiated to attend as well as long-time players. “Feel free to show up and hang out, we don’t care if you are experienced,” he says. “You can jump in and play, or just watch.”

WHAT: Dungeons & Donations benefit for Extra Life

WHERE: The Wyvernstale Tale, twitch.tv/thewyvernstale

WHEN: Friday, Dec. 11, at 6 p.m. to Saturday, Dec. 12, at 6 p.m.