was just wondering with playing my assassin. I normally get to put up to a maximum of 4 shrouds on a target. If I take the feat Crimson Eye Action which says When you spend an action point, you also subject your target to an additional shroud. Does that mean I can have up to 5 shrouds on a target?
I don't think that these feats let you exceed the maximum limit of 4 shrouds on a target, but rather let you pile on shrouds more quickly. Due to Assassin's Shroud[DDI] limit of once per round you'd usually need 4 rounds to get to the maximum number of shrouds but with the feat you can do it in 3 rounds.
Iirc there are three feats that do something like this: