I believe this is one of the best card in the game and a must grab for multiplayer games because of one other specific card: Delve Too Deep. As mentioned in the the FAQ, you cannot affect other players' interaction with encounter cards, so.... you cannot make then draw encounter cards! Essentially, at the cost of 1 action, 1 resource and 1 encounter card, the team gained Victory 1.
Now, how to "add" the card to your deck? Well, first of all, if your house rule is to pick any weakness at the beginning of a campaign instead of drawing random weakness, you are already set. On the other hand, if you obey the default rules, well, there is no penalty if you stop playing a campaign before it starts, wink wink. So hard reset the campaign until you get Self-Centered and Delve Too Deep in the same deck. (Any gacha game player can refer to the concept of the initial X number of free draws, and uninstalling and reinstalling until you like you initial free draws.)
Now this is my philosophy, a weird loophole( I like to find and exploit those ^^), and for "hardcore" gamers who want to maximize experiences on reruns. If you want a nice story, some decent challenges, please ignore all this and just enjoy your Arkham Horror.