Call of Cthulhu: The Card Game - Ancient Horrors Asylum Pack (2008)

Game description from the publisher:

Ancient Horrors centers around Monsters, Ancient Ones, and the brave (or insane) hunters that stalk them. Both Investigators and servitors of the Mythos will find powerful allies in this pack, such as Ghoulish Worshipper, Safari Hunter, Aspiring Artist, and new Ancient Ones Bokrug, Ghatanothoa, Atlach-Nacha, and others.

This Asylum Pack – a supplemental set of 40 fixed cards for Call of Cthulhu: The Card Game – features five new Ancient One characters and the investigators who track them, all designed to augment existing decks and add variety to the Call of Cthulhu metagame.

Update, 2011:

For the second printing of Ancient Horrors, FFG is updating this expansion from 40 cards to 60 cards (three copies each of 20 different cards). The card text has also been updated where needed to account for the most recent FAQ and errata.

Five Ancient One characters make their first appearance in the game, along with the investigators, hunters, and scientists who track them! Every card in the Ancient Horror Asylum Pack is a character, and every one of these characters belongs to a faction, making this one of the most faction-based and engaging Asylum Packs of all time!

The addition of the five new ancient ones greatly strengthens the four 'villainous' factions, this does not however throw off the balance of the game due to some powerful characters and Items that are introduced to the remaining three factions.