tyrlaan
Explorer
I've actually left a game because a GM did (1), amongst other things. I'd consider doing the same with a GM that did (2). Neither of those are a respectful way to treat your players, not to mention friends.Options:
1. If you just want the guy to play let him have whatever he wants for the power, then just don't ever send monsters that use weapons against the party.
2. Whatever you decide for the effect make sure it's realistic including the -16 to hit and such mentioned by another poster by the time you hit epic. Make sure to include several monsters in every battle with said power and just wait for him to ask you to get rid of the power.
3. Sarcasm aside I think the best option I've seen here is the weakened condition. Give him an at-will power that does NO DAMAGE but inflicts the weakened condition (save ends). What, he wanted to do damage AND disarm? This gives it a good existing system effect and a way to overcome the effect, plus you now have to CHOOSE what you're going to do....did I want to disarm him or kill him? Also this allows you to let anyone use the power. Make it STR vs. AC, but also work with that combat training feat so you can use your prime stat for it.
Me? I'd go with option 2.
Here's what I'd recommend if you go with a power. Note this is a rough design but hopefully something folks could use as a springboard for something more polished:
Disarm
At-Will * Weapon
Standard Action Melee Weapon
Target: One creature
Special: This power triggers an OA.
Attack: Strength - 2 vs. Fort OR Dexterity - 2 vs. Reflex
Hit: The target drops it's weapon at it's feet.
Notes:
(a) It takes a minor action to pick up a weapon.
(b) You suffer a -2 penalty to the attack roll if the weapon is being wielded in 2 hands.
(c) you suffer a -2 penalty per size category the target is larger than you.