[4e] purchasing advice, and why warlords?

[Kylarra]

Ahh, right. But what about the others mentioned here? The closest I could find to a weapon-based at-will with special effects was the Heavy Blade Opportunity feat, which doesn't count at all for purposes of the warlord's powers.

There are a fair amount in supplementary books (various Power series) as well as PHB2 and maybe some in DDI content, I forget.