UPPER LAKE, Calif. — The Upper Lake Post Office is inviting customers to unleash their imaginations and celebrate the 50th anniversary of Dungeons & Dragons with a special pictorial cancellation and stamp unveiling.

The Postal Service in partnership with The Dragon’s Den game shop will host a special stamp unveiling event for customers to celebrate Dungeons and Dragons, purchase stamps, artwork and special commemoratives.

The event will take place from noon to 3 p.m. Saturday, Aug. 10, at the Dragons Den, 9490 Main St. in Upper Lake.

Attendees will have the opportunity to purchase Dungeons & Dragons First-Class stamps and receive a free pictorial cancellation with purchase.

Dungeons & Dragons brought a new type of game to tabletops all over the world, one in which players collaborate by telling an open-ended story guided by books, dice and their own imaginations.

By inviting participants to imagine themselves as wizards, warriors and other adventurers in exciting and treacherous fantasy worlds, the game opened doors to whole new universes of creativity for generations of players.

From its Midwestern roots as a niche pastime, Dungeons & Dragons has grown into a global phenomenon, with an estimated 64 million fans worldwide since its debut in 1974.

Greg Breeding, an art director for USPS, served as both art director and designer for the stamps.

The pane of 20 Dungeons & Dragons stamps features 10 different designs that highlight characters, creatures and encounters familiar to Dungeons & Dragons players.

The free pictorial cancellation will be available at the Upper Lake Post Office for 30 days.

Pictorial postmarks also may be obtained through the mail for anyone unable to attend through Sept. 10.

For one or more postmarks, affix the minimum of a First-Class stamp to an envelope or postcard, address the envelope or postcard to yourself or to others, insert a card of postcard thickness in the envelope(s), and tuck in the flap(s).

Place the envelope(s) or postcard(s) in a large envelope and mail to Upper Lake Post Office, ATTN: Upper Lake Postmaster, 9435 Main St., Upper Lake, CA 95485.