The initial use of this card is pretty obvious: fill up the bag with blessings, and then play Ward of Protection at a cost of one fewer horror and one less resource. It also works on fellow investigators! The trade-offs are clear: it’s not automatic. But with favor of the sun, it becomes automatic. With Tides of Fate, it becomes much more common; that card specifically lets you play it before drawing cards in the mythos phase. This card shines in support Mary or Mateo, where a lot of your game is spent filling the bags with goodness and protecting your fellow investigators.
Fast. Play when an investigator at your location draws a non-weakness treachery card.
Reveal 5 random chaos tokens from the chaos bag.
If a or token is revealed, cancel that treachery card's revelation effect.
The Innsmouth Conspiracy #31.
"random" does not forbid this (at least, not without forbidding it for skill tests as well. The language used for skill tests is "The investigator performing the skill test reveals one chaos token at random from the chaos bag.") — Yenreb · 9