Serpent Gargoyles
The Stone Serpents guard the Philosopher's Gate. There are three of them and they came alive after Larson and Lara disturbed the gate. The flung Larson across the courtyard but did not kill him. They were all destroyed by Lara.
Powers
Each serpent does not move from the door of the gate, showing their loyalty to protecting the Philosopher's Stone. They can move as shown in the cutscene before Lara fights them but choose not to during the battle. Each serpent can shoot fireballs. You can see the fireball brewing in a serpents mouth before they shoot it, giving you time to prepare to manoeuvre. If Lara is hit by a fireball, she will be set on fire and will die in a few seconds if she had a full bar of health. If set on fire, Lara must run to a nearby pool of water quickly before the flames consume her. The serpents will also lash out if Lara gets too close.