Drachenfels, Season 2, 2004.
Rusty Dagger is a rusty brown dagger that dropped on Drachenfels during Season 2. You ay be interesed in a Rusty Cutlass, that dropped as well during the same season on Drachenfels.
There was also a Rusty Dagger that dropped later on, on Nappa Valley Shard. It has a different graphic.
4 of these were originally created.