Thralls

Underworld Zombies
Occurrence	Underworld -Xibalba
Enemy Type	Undead
Classification	Guardian
Distinctiveness	None
Weapons	Unknown(probably claws)
Weakness	Unknown(Lara is seen in trailers fighting hand to hand with them and using a bike to run over them)

The second trailer for Tomb Raider Underworld shows Lara takle her way through many locations, their was a scene were Lara was riding a motorcycle through Xibalba. Then she runs over a zombie. In recent screenshots released by IGN,they can be seen in more details,showing that they wear viking armours.Their weaknesses are unknown to this point,but Lara is seen fighting Hand to hand in trailers and screenshots,this suggests that the only way to kill them may be to defeat them in combat.