This blade is composed of enchanted ice that spontaneously grew from the cast off shard of the archetypal ice blade, which legenda called Frostrazor,
The ice of the blade is continually melting, but it also automatically resublimes from the air to maintain a perfect blade edge.
Each time the wielder strikes a foe with a weapon adjusted 20, a shard of ice breaks off in the wound , causing additional damage per round as a sword of wounding, until the ice ice melts in 1d10 rounds and the main blade reforms itself instantly.
Icerazor normally provides a +1 bonus to both attack and damage, but the power of the blade is magified according to the power of the wielder. For every 4 levels possed by the wielder, Icerazor gains an additional +1 bonus to attack and damage.
Thus, 1st - 4th level wielders swing a +1 blade, 5th - 8th level wielder swings a +2 blade, 9th - 12th a +3 blade, and so on. A 17th + level wielder swings a +5 blade, but if he drops Icerazor and a 3rd-level fighter retrieves the sword, Icerazor is only +1 in his hands.