Giantslayer

)   Giantslayer
Base item	long sword
Damage vs. small	1d8 x2
Damage vs. large	1d12 x2
To-hit bonus	+1d5
Bonus versus	giants
Weapon skill	long sword
Size	one-handed
Affiliation	neutral
When carried	(none)
When wielded	(none)
When invoked	(none)
Base price	200 zm
Weight	40
Material	iron

)   Giantslayer (UnNetHack)
Base item	sling
Damage vs. small	1d2 x2
Damage vs. large	1d2 x2
To-hit bonus	+1d5
Bonus versus	giants
Weapon skill	sling
Size	one-handed
Affiliation	neutral
When carried	(none)
When wielded	18/** Strength
When invoked	(none)
Base price	1200 zm
Weight	3
Material	leather

Giantslayer is a neutral long sword that does +1d5 to hit and double damage against monsters with the M2_GIANT flag: giants, stone giants, hill giants, fire giants, giant mummies, frost giants, storm giants, giant zombies, Cyclops, and Lord Surtur, but not ettins or titans.

Strategy

Like most of The Banes, this weapon has too narrow a damage range to be particularly useful. Likely its main use is that it might unrestrict the long swords skill for a neutral character, without requiring them to be crowned; this could be useful for a character who finds Frost Brand on the floor, for example. Also, unlike some other Banes, it is at least derived from a good base item, so is actually useful against giants. However, giants are rarely dangerous enough to need a particularly effective weapon to take them out.

SLASH'EM

In SLASH'EM, this weapon is removed in favor of Giantkiller, a neutral axe with the same double damage range. As an axe is a far weaker base weapon than a long sword, Giantkiller is even less useful than Giantslayer.

UnNetHack

In UnNetHack, Giantslayer is instead a neutral sling, with bonuses versus the same group of M2_GIANT monsters; it provides warning of, and +1d5 to hit and double damage against them. It also sets the wielder's Strength to 18/** .