|A massive enchanted cudgel that augments the already considerable strength of anyone mighty enough to wield it.|
Skullcrusher is a giant club of speed. Even with the mediocre enchantment level, if you find and are able to wield it, it's one of the best universally-effective weapons you could hope for, comparable to a favorable Trog gift, or a giant spiked club with a lucky scroll of brand weapon used upon it. The skullcrusher itself may be the result of a Trog or Okawaru gifting.
Prior to 0.15, "Skullcrusher" had a +0, +5 enchantment level, and only granted +5 strength.