ToME: the Tales of Maj'Eyal

I created awesome Crystalline Voratun dagger (1323664873809.6-1720764335952.5 power, 9 apr) ...
It is here in my inventory: http://te4.org/characters/1718/tome/2ed ... 1cc000edf0
I dont use it becouse it makes game very monotonous.
Is it a bug?

Yeah, that's a bug somebody already reported...

Also: wow, the damage actually goes above 2^32...