use subzero's combo moves not his special moves,but first it helps to destroy the komidoku by walking into them.{the best combo is [],/\,o,L,[],/\,L,o}
both are at close ranges and the first one is a freeze slam and it is back, forward, down, forward, (Y or Triangle) the second one is, Back, Back, Down, Back, (B or Circle)
Sub Zero & Scorpion.
Unlock Sub-Zero
After taking the boat ride across blood lake, his VS. icon is in back of the lion looking statue to your left (facing the big door), just run along the wall and...
In the Lin Kuei Palace after fighting with the Subzero look at the coins on the ground they form an arrow towards a statue if you shoot a fireball at it you will get the Amulet.