Cost: 2.
Test Icons:

Investigate. Choose an enemy at your location. You get +1 for this investigation for each damage on the chosen enemy (to a maximum of +5 ). If you succeed, discover 1 additional clue at this location. This action does not provoke attacks of opportunity from the chosen enemy.

Joshua Cairós
The Search for Kadath #114.

This card appears to be an apology to rogues for the insult to their intelligence that was Eavesdrop. For the most part, rogues have had a harder time picking up multiple clues with a single action than other classes -- and Eavesdrop joined Intel Report as a means of correcting that. But it's an extremely situational card, requiring you to be at a location with clues AND an unengaged enemy. And even then, you're pitting your likely average Lore against the enemy's evade value without a boost.

This card is a quite a bit better. You still need an enemy at your location, but now that enemy can be in any condition -- aloof, exhausted, engaged with you, engaged with someone else. And it gives you a handy boost to your Lore as well if the enemy is damaged. It's easy to imagine a turn in which you need two actions to dispatch a 3-health monster. You could squeeze "Followed" between those actions, and give yourself a +2 to your investigate. Or, you hang out with your guardian while she's whaling on something fierce, and benefit from her toils.

This card isn't quite the equal of Scene of the Crime, Read the Signs, "Look what I found!", or Deduction -- other class's tools for multi-cluevering. Even among Rogue cards, Intel Report is probably better -- especially for well-heeled rogues like Jenny and Preston. But it's decent. For rogues with seeker aspirations, it's a worthy inclusion.

Eh, I actually think this is a fair bit worse than Eavesdrop. It’s more expensive, and Eavesdrop more easily fits in Rogue decks that care about evading and investigating, which is more common that Rogue decks that care about fighting and investigating. The boost is... there, sometimes, maybe. But if I’m engaged with an enemy I would say investigating is not a high priority in that moment. Scene of the Crime is an exception since the clues are testless, but wasting an action you could have used to deal with an enemy to fail an investigate test is an incredibly bad play. — StyxTBeuford · 1332
It's a fair point, StyxBeuford. If you're going to evade that monster anyway, Eavesdrop is nice to have. But even in that case, Followed only costs one more (seems like a crapshoot whether the shroud value or the enemy's evade will be higher). But Followed works in other situations, too. In multiplayer, monsters are going to be frequently engaged with your friends. If you're running Eavesdrop, you'll have to hope your likely non-rogue friends evade that monster so you can come in take a listen. Or you spend two actions to engage and then evade it yourself -- horribly inefficient. Followed grants you much flexibility and a possible skill boost for only a slight price increase. — Mordenlordgrandison · 113
I tend to agree with StyxTBeuford that Eavesdrop is the better of the two cards. Like it's a very niche card, but it does have a niche. If you're Finn and set up to evade more or less everything you encounter, you can use Eavesdrop to reasonable effect. Eavesdropping on bosses , for instance , is more viable than you might think. Extracurricular Activity , Curtain Call, The Untamed Wilds and The Witching Hour all have enemies that you may not want or be able to kill when they spawn, but that you might want to investigate around. Eavesdrop can do that. It also isn't an investigate action , so it circumvents restrictions on that. But Followed, I can't really see a niche for. If you're a Rogue and mostly fighting , you're Tony (or maybe Skids or Jenny) and Scene of the Crime is the card you want. If you're not, you're evading and Eavesdrop has all of the benefits of this card with none of the risk of getting stuck engaged with something you couldn't finish off because you spent your turn investigating. So , I don't really see what this card is for :( — bee123 · 24
Granted, Followed is easier to get working in multiplayer, but it’s still a lot of circumstances to fit together just to get two clues. Eavesdrop isn’t particularly good either, but it at least makes sense for Finn or maybe Skids. Followed at best fits with Tony and even for him the icons are quite bad if the card isn’t useful to him in the moment. — StyxTBeuford · 1332
I think Followed is designed to be used in Tony decks -- with his middling Intellect, he appreciates any extra intellect boosts, and Tony's extra action can be what you need to use Followed while engaged with an enemy before finishing off the same enemy on the same turn. I agree that it is niche though. Besides Tony, I think Jenny is the only investigator that might like Followed -- as mentioned by others, Skids/Finn likely prefer Eavesdrop and Finn himself also has better off-class options (e.g. Winging It or Deduction). — iceysnowman · 129
And the thing is Tony is plenty good at investigating without it, especially with Crystallizer. I would not want it in most of the Tony decks I’ve made- too specific and not really powerful enough to justify. — StyxTBeuford · 1332

Mark Harrigan able to use it because it's tactic card too. When use along with Evidence! after defeat it. He got 3 clues as total.

Also you can youe Scene of the Crime before this card to get 4 clues instead.

However, it initiated the test so you can use Double or Nothing to get 4 clue if success too. That can use Momentum to make it really easy.

AquaDrehz · 143
Thats a lot of resources you’re asking from Mark, who isnt exactly flush with cash. — StyxTBeuford · 1332