The disarm maneuver has almost totally disappeared from D&D 4th edition. However, at least one Fighter power - Exorcism of Steel - allows it.
Exorcism of Steel - Fighter Attack 17
You make a powerful chopping attack against your foe, forcing it to drop what it is holding.
Encounter * Martial, Weapon
Standard Action - Melee weapon
Target: One creature
Attack: Strength vs. Reflex
Hit: 2[W] + Strength modifier damage, and the target drops one item it is holding. You can choose to catch the item in a free hand or have it land in your space.
- I know that some monster powers explicitly require the use of an item because they state so in their power description (like the Drow BlademasterDDI Excruciating Stab).
- I also have no problem in judging that a monster power whose name matches one of the items in its possession requires that item in order to be activated (like the Goblin CutterDDI Short Sword).
However, 2 questions arise.
What if a power doesn't match neither of two categories above?
For example: the Lolthbound GoblinDDI Stinging Blow
Stinging Blow (standard, encounter) * Poison, Weapon
+10 vs AC; 1d8+5 poison damage (crit 1d8 + 13), and if the target is taking ongoing poison damage, that ongoing damage increases by 5.
Is the Goblin able to use that power if the Fighter has deprived him of his war pick?
What about disarmed monster attacks?
Is there a general (quick) rule for judging the lack of precision and damage potential a disarm maneuver (like Exorcism of Steel) should produce? The first that comes to my mind is to give the monster a -2 penalty to attacks with weapon/item-sensitive powers and to make them deal half damage.
Should the Dungeon Master instead reverse engineer the proficiency, special quality and intrinsic magic bonus of a weapon (or implement) of a level appropriate for the creature?
Final note: I know that this is the appropriate field where a DM should step in and take decisions. I'm only wondering if Exorcism of Steel is a true exception in the D&D 4th framework or if it has some sort of rule support.