Done using Scroll of Secrets? Use Library Pass and play your second Scroll of Secrets. When the first copy goes to bottom of deck, draw it out with your second copy and continue the cycle. Scavenging might be better if you have access, but this is an alternative that doesn't require passing a skill test.

Just since I don't see much discussion- I think this card is a good deal for Trish Scarborough. She can reliably get 2-3 uses out of it, far more with Dirty Fighting or common boosts like Streetwise or Magnifying Glass. As an alternative to Obfuscation, it means you can reliably trigger your ability even on locations with high Shroud, where an investigation success wouldn't be guaranteed- with the nice side effect of gaining up to two clues on that location if the enemy's otherwise easy to evade.

Trish has some pretty fierce competition for Hand slots, so Obfuscation does win there, but Credentials goes down a lot easier with a Hidden Pocket to defray the slot cost, especially if you're running a Tool Belt deck with other rogue/seeker staples.

At level four, it just keeps getting better, all but completely replacing Obfuscation and Pocket Telescope and very nearly outcompeting a similarly-costed Damning Testimony and Breaking and Entering.

Thanks to "You owe me one!" and Black Market, you can potentially turn anyone into anyone else. Having Norman Withers pick up a copy might be the best way to set up a guaranteed hit on Black Market, or let a teammate know when to play You Owe Me One without table talk. So what is this crazy thing actually good for?

• Access an investigator's stats and ability without having to cope with their weakness

• Combine one investigator's signature card or deck building options with another's abilities.

• Swap in or out of Investigators whose abilities affect set-up, are one-shot, or have notably better value in the late game or early game.

• Theoretically you could just take it as a toolbox card planning to adapt yourself to the needs of specific scenarios. But it's probably not really worth it without a plan.

What am I most excited for?

• Turning Preston Fairmont into anyone who's not Preston Fairmont. You get real stats + a special ability + remove the handicap on normal resource-generation effects. The same "My ability is really a permanent" trick works to bring Lily Chen's disciplines or Luke's Gat Box into any other investigator.

• Turning any mystic into Patrice Hathaway so you can draw 5 cards per turn with a lean deck and access to level 5 purple.

• Turning other Seekers into Norman Withers or Monterey Jack to get their powerful abilities without thier deckbuilding restrictions.

• Turning Sister Mary into Michael McGlen?

• Turning anyone with a lot of healing directly into the second-stage versions of Hank Samson, or turning Hank Samson into someone else to get around his no-healing rule.

According to the Rules Reference (https://arkhamdb.com/rules#Cancel), in the Cancel section, you totally can play Dodge to cancel the incoming attack, and Toe to Toe will still work!

"Any time the effects of an ability are canceled, the ability (apart from its effects) is still regarded as initiated, and any costs have still been paid. The effects of the ability, however, are prevented from initiating and do not resolve."

Um... I have questions :P

1) I feel a very important aspect of the front of the card was omitted from the inclusion list: The name of the investigator!!!

Is this by design? In other words are you meant to still have the name of you original character, preventing unique cards and unique weaknesses from breaking or do you now have another name such that a whole lot of unique cards no longer work (Sefinas Painted world and her weakness for example would both be unable to find any card beneath Sefina, if you now have another name and therefore there is no Sefina. Luke Robinson can not enter the dream gate if his name chances etc etc).

If you do not change name there is a whole plethora of investigators that reference themselves in the abilities on the front of the card, so those would stop working if you retain your old name.

Both switching name and not switching names creates many strange and broken interactions :P

2) What happens if a character capable of putting investigator cards under itself (like Diana or Sefina) uses this to turn into Amanda Sharp? Amandas ability is not worded with multiple cards in mind so you would have to do a bunch of guessing how this works out.