Flamelurker

The Flamelurker is a creature from the Armor Spider Archstone (level 2-2) of Demon's Souls. He is a large demonic entity whose physical form is shrouded in fire, found deep within the Dragon Burial Ground beneath the Stonefang Tunnel (level 2-1).

Berzerk Rage
The Flamelurker is a furious being, charging at the player at full speed during most of its' appearance.

Immunity to the Inferno
The Flamelurker is engulfed in flames during the entire combat, taking no damage whatsoever from its condition.

Frenzied Speed
As previously mentioned, the Flamelurker charges at the player throughout most of the fight, as well as pouncing when it has the opportunity.

Magical Susceptability
Coating your weapon with certain alchemical resins, or imbuing it with magical properties, enables the player to deal significantly more damage to the Flamelurker.

Corner Trap
If a player leads the Flamelurker into a certain corner of the arena, it will simply be incapable of getting out of that corner if you strike it in a certain rhythm.