Ancient Figurine

Increases the Intelligence of the Hero by 1 when carried.

This small statuette depicts a scholarly figure seated on a stool studying a large book stretched across his lap. The race and gender of the delicately carved individual is indeterminate, as it wears a hooded cape that drapes down over its darkened face. The entire figurine appears to have been carved of a black crystalline substance that defies identification.

Source
Thrall can find one in The Long March, chapter 2 of the Warcraft III orc campaign, The Invasion of Kalimdor.