The Orog-hai

Description
The Orog-hai were trolls, but more fearsome than anyone would imagine a troll could be. These trolls were like the great uruk-hai, bred and perfected by Sauron. For as Sauron transformed orc into uruk, he also transformed troll into Orog.

The Orog-hai were perfected like the uruk-hai in that they were not afraid of sunlight, for they would not turn to stone if exposed. They were also bigger and stronger than normal trolls, and not as stupid. They possessed the trait of advanced speech, and were somewhat intelligent. Indeed, this combination of troll strength and orc intelligence made them rightly feared on the battlefield and by their lesser peers.

However, for all their strength and powers, the Orog-hai shared the same fate as all the creatures bred by Sauron after the Fall of Mordor. With Sauron gone from the world, the Orog-hai became unaware of themselves. They wandered here and there, behaving like vegetables, and were easily hunted and destroyed. For without their maker, these beasts were deprived of mind and spirit, and were lost.

Referances
A Tolkien Bestiary by David Day