Hobgoblin Chiefs, called Hobgoblins in the iPhone version, are huge, heavily armoured goblin-like creatures wielding a massive bloody sword. They serve as mini-bosses in the Rage Valley Endless stage in Kingdom Rush.
Block them with Barrack soldiers and pound them with excessive firepower. Soon it will be strong enough to overrun all your defences, but until then, do your best.
Its health and damage rapidly rise with each appearance, reaching hundreds of damage and over 20,000 life. Combine with the Totems, especially the Healing Totem and Speed Totem, it pose a great threat if not countered well.
Use heroes that had very heavy armor, like Gerald Lightseeker and Hacksaw. they can stall them for a long period of time, but not pretty long starting at wave 50.
Hobgoblin Chief seems easy to kill at first, but extremely hard, especially past wave 30. they can ended up stronger than boss, which is more likely for a player to concentrate them before they escape. Even health could be the problem, because at wave 50 and onward, he had even more health than Sarlegaz, which has 18000 HP.