Baffling card, it's literally so bad that words can barely describe it. It's barely useful even if it were a 0-xp card, much less 3!!
So, what does it do exactly? It:
- Negates all non-elite attacks during the enemy phase.
For this to be useful, there needs to be an enemy phase where enemies are going to attack you, an unideal circumstance to start with, if there is a non-hunter enemy attacking you that means that you've gone a full round engaged with an enemy, failing to deal with it or ignoring it wholly, or ended your round for some reason with a ready enemy. The other case is if a hunter catches you, this might be more probable but still not ideal or common by any means (Not that hunters are uncommon, but the usual response to a nearby hunter is to go and deal with it, not stick around and wait for it!)
There is another card that harkens to this one, On the Lam, seing how this strength operates and gives you total freedom for a round sorta displays what they were thinking for Infighting, it's just not nearly as useful!
The biggest issue with Infighting is that its a niche card that does nothing but ease the pressure off you a LITTLE, but only when you're completely drowning in trouble. The non elite text is the real dealbreaker here because it's during battle with Elites where this particular effect would be good (or rather, the time where youre most likely to drown in enemies), Infighting is basically a fancy Dodge, in fact I think 3 Xp is just right an amount of XP to turn Dodge into an "AoE" effect, but it isn't, and it's just terrible.
P.S Oh, just to be fair, at least it has pretty great icons. Most of the time it'll be a 3-xp Unexpected courage with some rarely helpful text on it. I quite often use Eucatastrophe for the icons rather then text so i'm not kidding when I say that sometimes an Unexpected Courage with extra text on it is perfectly reasonable. Infighting is not one of those cases.