The Orc Warlord will chase the enemy while throwing stars, they retarget and will kill weaker creatures to reach you.
As the most powerful orcs, they aren't called Warlords for nothing. They are tough creatures but drop good loot. Found usually leading groups of Orc Leaders and Orc Berserkers. They could hit pretty nasty, so be ready to heal.
To beat these powerful creatures you will need to get a good team with high-skilled Knights, Paladins and Mages with a high Magic Level. The best way to kill them is from a distance because their Throwing Stars are weaker than their close combat. Knights with skills 90/90 and a scrapper arena weapon can kill them fairly easy. Its attacks can be compared to a Giant Spider. Orc Warlords are more profitable to hunt since Orcish Axes have become sellable, and now make up the most valuable part of the loot.