Yeah, if it were just a couple of monsters, handful of powers, I wouldn't have come to the conclusion that I did.
But it's really a _lot_.
That power would trigger a mark, just like Twin Strike would if you split the attacks. No confusion about that, that is the RAW, it says it under melee attacks, specifically declaring multiple attack rolls = multiple attacks for melee. The full definition of "attack" in 4e, according to pages 269-276 of the PHB and Monster Manual 1-3, is you roll a d20 to see if you hit AC, Fort, Reflex, or Will.
As has probably been noted, several things are designed and worded by people not familiar with this definition. Doesn't change the printed rules.
An alternate theory is that WotC started making more monsters with melee/ranged multi-attacks because a common complaint from players is that their DM's never violate their defender's marks. These powers would give the DM a good incentive to violate the mark(compared to a single attack power) without forcing them to do so.
The marked condition cares about the Target: line, not the attack: line or the Hit: line. If the fighter is included in the Target: line (or the equivalent for monsters) then the mark does not trigger. It's that simple.
In the case of Twin Strike, it has one target line. So therefore, if the marker is one of those target, the mark does not work.
Well, let's see.
If the power is a melee or ranged power that has multiple targets, it's multiple attacks as per the descriptions of those attack types.
[...]
Close and Area powers are multiple rolls, but a single attack with a single damage roll. Exception to the above, unless the power is 'Make a melee basic attack against all enemies in the burst' in which case it qualifies as above.
When you attack, you make an attack roll to determine whether your attack hits your target. You roll a d20, add a bonus for whatever attack you’re using, and compare the result to one of the target’s four defenses: Armor Class, Fortitude, Reflex, or Will.
Targeted: Melee attacks target individuals. A melee attack against multiple enemies consists of separate attacks, each with its own attack roll and damage roll.
Targeted: Ranged attacks target individuals. A ranged attack against multiple enemies consists of separate attacks, each with its own attack roll and damage roll.
Yep. Both refer to the same definitional failing: WotC has never been very clear on what "an attack" means in 4e. Before this power revision, though, the ambiguity didn't have a whole lot of tactical implications.Reminds me of some of the discussion around whether magic missile is an attack or not![]()
Whatcha mean by penalty stacking?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.