Marks?

[BigCat]

Hi folks. I thought I had a handle on the new "marking" mechanic - it seemed to be tied to particular powers, especially defenders. But I noticed in the stat block for the skeleton warrior that it marks anyone it hits with its weapon:

Skeleton Warrior Level 3 Soldier
Medium natural animate (undead) xp 150

m Longsword (standard at-will) * Weapon
+10 vs AC; 1d8 +2 damage, and the target is marked until the end of the skeleton warrior's next turn; see also speed of the dead.

Speed of the Dead
When making an opportunity attack, the skeleton warrior gains a +2 bonus to the attack roll and deals an extra 1d6 damage.

However, it doesn't seem to have any powers that take advantage of the mark. Does marking have some generic effect as well?

 

[Blizzardb]

Yes, the generic effect is -2 to all attacks except against the character that marked you.