From the publisher's web site:
Journey to Unknown Kadath is the sixth Asylum Pack in the Dreamlands expansion for the Call of Cthulhu Living Card Game. The search for Twila Katherine Price comes to its conclusion, but in the Dreamlands, what you seek and what you find are rarely one and the same...
Journey to Unknown Kadath contains 20 different never-before-seen cards based on the dark mythos of master horror writer H.P. Lovecraft, designed to augment existing decks and add variety to the Call of Cthulhu metagame.
This is not a stand-alone deck; you must have additional Call of Cthulhu LCG cards to play.