The Dagger 'Belangil' (2d4) (+6,+9)
It's the standard weapon of rogues and thieves. The blade is a foot long.
A frosty dagger surrounded in a nimbus of ice with a hilt of elk horn and
an edge to wound the wind.
It can be activated for frost ball (48) every 5+d5 turns if it is
being worn. It increases your dexterity, speed and attack speed by 2.
It does extra damage from frost. It poisons your foes. It provides
resistance to cold. It allows you to see invisible monsters. It
slows your metabolism. It speeds your regenerative powers. It cannot
be harmed by acid, cold, lightning or fire.
Level 10, Rarity 40, 1.2 lbs, 50000 Gold

(T.o.M.E. 2.3.5)