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.

Stephen Somers
L'Era Dimenticata #85. Agenti di Yig #5-6.
Curse of Yig

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.

A week ago I might have agreed that the -1 fight was more annoying than bad. Then I played a scenario where it knocked me off the "sweet spot" and made spooky tokens incredibly dangerous. I'd say if you're the fighter, it's either annoying or devastating, but otherwise it's pretty irrelevant. — SGPrometheus · 636
If you’re at 1 health, this makes you paranoid when you draw encounter cards — Django · 4134

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.

Secutor145 · 3
That is a pretty edge case, you must admit. Maybe the lesson is "don't run Calvin through TF..." — LivefromBenefitSt · 887
Killed me once as Trish! — MrGoldbee · 1233
True. It was our first FA run. Guess he would reconsider his choice of charactor knowing how terrifying the jungle is. — Secutor145 · 3
Calvin likes trauma, though, and TFA awards a lot of trauma. I think that's what they were going for releasing him as part of that cycle anyway. — Zinjanthropus · 205
Calvin can also take both Test of Will and Ward, as well. — Zinjanthropus · 205
The trick is to get it to stop awarding Trauma, although I guess that is a problem bigger than Calvin. — LivefromBenefitSt · 887