Implementation request: WHO secret lair

There are a number of mechanically unique cards added in one of the Doctor Who secret lairs: https://scryfall.com/search?order=set&q=e%3Asld+cn%E2%89%A51580+cn%E2%89%A41584&unique=prints

These were not listed in the WHO set implementation thread so perhaps they should be added there or added as a new implementation tracker.

Start with the Scryfall search linked in the issue to identify the mechanically unique Doctor Who Secret Lair cards, then compare them with the WHO set implementation thread. Determine where this repository tracks card implementations; done means the identified cards are implemented or their status is recorded in an implementation tracker.

Written by the indexing model from the issue text.