
I’ve only used it on Amanda on hard, but thus far its been absolutely busted. The way i see it this card has three fairly powerful modes for amanda:
Seal the 0s and fail 3 checks to draw 6 or maybe even 8 cards if you get a mythos phase test. In a skill heavy deck you desperately need draw, and this is twice as efficient as draw actions. It’s like a worse take heart, but I’d be happy to pay 1 xp for take heart on amanda. I rate this mode 8/10.
Seal the 0s and try to succeed on all 3 checks. (Do you get the cards during the commit step so you can commit the 2 you draw?). By committing 2 cards to go card even this suddenly this looks like a 4 pip card that gets you closer to your important assets without costing any actions. If you can beat most of the chaos bag then removing the 0s only marginally reduces your chance of success. This is the best mode 10/10.
Finally you can seal the 3 nastiest tokens in the bag. This mode is strictly for special tokens that kill you or for sealing away special tokens when you’re winning so hard you can afford a little decadence. If you just need to succeed draw 2 and commit both instead of using this mode. 4/10 this mode is very rarely worth while.
With the added benefit of flexibility it becomes absolutely nuts on Amanda. Amanda would be happy to pay 2 or maybe even 3 xp for this. Amanda exaggerates the power of this card, but its still quality deck thinning that helps you with a single test for only 1 xp on survivors. Definitely find room for it before the end of your campaign, but get your key synergy xp cards first (unless you are amanda or sylas).