Originally posted by Ridley_Prime
Allowed her to absorb X-Parasites and made her more vulnerable to ice/cold. That's it really.
Don't be special, by the end she's no longer vulnerable to cold.
idk I think Nintendo just didn't expand on it as much as they should have. Samus could gain life draining abilities and increased durability. Seeing that you can only kill a Metroid by first freezing them with their only weakness which is cold temperatures at or near absolute zero and then attacking them with super high powered weapons.