Ling and stra, the two together!

Ling 'The creature' is stuck to Stra's head. Ling has an attack mechanism, where he injects Furbiosa ore, into a human's vein, and accelerates hormones resulting in ageing almost 100 times faster. There is no cure for it yet, but the hormones can be slowed down, with the 'Flask'.

Ling:

Ling is a creature, that can be found in caves. Usually around Furbiosa mines. They are living, by haning off the ceiling and consuming the ores. They like darkness. If a human tries to attack or approach them, they active a so-called defense mechanism. The try to leech on the human's head, biting through the skull, and ingesting the Furbosa.

Stra: 

Stra is from the Borbode tribe. We get to meet their youngest son, named Stra. One day he will be the tribe's leader. Or so they thought. One day, he wandered off by himself. He found himself in a Furbiosa cave, with a mine system. It's abandoned. He went inside. It was dark and he couldn't see anything. Suddenly he felt dizzy and ran out of the cave. He noticed that something's on his head. It was a ling.