Quicksilver

Origin
This dagger was found in Chimeron at the fifteenth feast of that land.

Effects
Quicksilver is a silver dagger with a special enchantment that allows it to withstand hazards that would break any normal dagger. Due to this magical nature, a spell to repair magical items and a spell to add silver properties is required if the blade is ever disenchanted.

In some cases, the dagger is able to hold open magical rifts (in-house power).

Source
http://library.cityofivory.org/533/Quicksilver