Oh, Yig, you wily monstrosity! The -1 isn't so bad, the -1 health definitely sneaks up on you and makes you more paranoid, and the Serpent trait keeps getting you excited when you draw Encounter cards like Children of Valusia and think you are getting a benefit, then you notice it's "Serpent enemies," and you hear Yig laughing in the distance. Drat you, Yig! That Pit Viper was trying to bite me! We need a card called "Reasonable Explanation" that removes Vengeance.
Revelation - Put Curse of Yig into play in your threat area.
You get -1 , -1 health, and gain the Serpent trait.
: Test (2). This test gets +1 difficulty for each vengeance point in the victory display. If you succeed, discard Curse of Yig.
Last time my friend as Calvin Wright with only 1 health left drew this. He kept Perseverance in hand for damage dealing treachery , but Curse of Yig doesn't deal damage, making Perseverance useless against it. Calvin died during his transformation into Serpent, sadly. What a nasty encounter card.