The Shard, the tallest skyscraper in western Europe, unveiled its dazzling new light show on Monday.
Occupying the top 20 floors of the building, the super-bright rays are visible across London.
Aside from summoning nameless forces from the heavens, it's also part of a fundraising appeal for Cancer Care at Guy’s Hospital.
You can make a donation and enter the Shard's advent competition, with a different prize to win each day, at advent.the-shard.com.
The display continues until New Year's Eve...
...or until extraterrestrial life finally responds to our primitive communications.