Official Rules for Arkham Ritual
There are no errata at this time
How do I use the extra cards?
This is outlined in Section 9 and 10 of the rulebook. You always play the game with 22 cards. You can swap cards inside “Add 1 of the following to your deck” in section 10-2, 10-3, and 10-4. For example, you would choose to play the game with either “Magical Orb” or “Shining Trapezohedron”.
Will player ever have more than 1 card in their hand?
No, you will only ever have 1 card in your hand.
Will I ever survive holding a Cultist at the end of the round?
No, you will never survive a round if you are holding a Cultist.