Cellar Spider

The Cellar Spider is a stronger version of the Lonely Spider, it is often found in The Catacombs, hiding above doorways or entrances. Like most dungeon mobs they have varying amounts of health depending on what floor of the catacombs you are on. It can have modifiers such as Healthy, Flaming, Stormy, Speedy or Fortified. Healthyincreases the mob's defence. Fortified increases the mob's Defence. Flaming makes melee attacks light the player on fire. Speedy makes the mob move much faster. Stormy makes the mob strike lightning on nearby players, dealing true damage.

Behavior
They spawn in groups of 3–5. They don't attack unless you walk under the area they are in.

Trivia

 * They are the only mob (aside from secret bats) that can hide behind secrets