Bloody Path
Bloody Path, or as it is popularly known, DURR... CLANG! is a 15th level Rogue power in 4e Dungeons & Dragons. It has drawn a lot of criticism because of the odd way the mechanic works and the very undescriptive fluff, making it extremely unclear how exactly the character is meant to be causing the effects described by the ability. The power effectively forces every enemy the rogue runs past during his movement to make a basic melee attack against itself.
Ignoring situations where this is physically impossible (such as a Beholder making a bite attack against itself), many argue that the targets of the ability are in fact attempting to attack the rogue, but the rogue is cunningly parrying and otherwise redirecting their attacks as he travels so they instead strike themselves. Others argue that this makes just as little sense as the original fluff, since enemies with better attack bonuses (who could hence be assumed to be more skilled in combat) are actually more likely to hit themselves. It also raises the question as to how exactly a human-sized (or even smaller) character is capable of parrying or redirecting the attacks of creatures much larger than they are, such as adult dragons. (It's supposed to be the Rogue rushing into a group dodging their attacks in a way for the group members to attack each other.) Except even that doesn't work because it doesn't make sense for people who are being hit by allies are, in fact, being hit by their own weapons, and that makes even less sense if there's only one person. And on top of all that, the opponents are forced to make the opportunity attack, meaning any enemy wishing to hold his OA for whatever reason until later in the round is SOL. This also clears the threatened area for any allies wishing to follow the rogue on the same round.
Judging by how the mechanic actually works, the only "logical" explanation is that the rogue is suddenly manifesting short range mind control powers and forcing every enemy he runs past to spontaneously turn stupid and then attempt to stab themselves, hence: "DURR... CLANG!"
A proposed alteration to make the ability make slightly more sense is to negate the opportunity attack of the targets and allow the rogue to make his own attack as he passes.