The Armor Spider has six attacks in total, but pulls out a different moveset depending on how far away you are from her.
Demon’s Souls - How to beat Armor Spider
When you’re not in melee range of the Armor Spider, she can only do three different attacks.
The first attack is her web shot. If this attack lands, it will do some damage and encase you in webbing, which makes you slow and unable to roll. If you block her web shot, you will still get webbed. Your only option is to roll through it. The second attack is a large fireball that she spits at you. The third and final ranged attack is a volley of three fireballs that she sprays 2-3 times. Both of these attacks can be dodged by rolling through them, hugging the sides of the tunnel, or blocking them with a shield.
When you enter melee range, the Armor Spider starts using her three close range attacks.
Her first attack is a swipe that can be rolled through or blocked. The second attack is a slam. To avoid it, you need to position your character directly in front of the Armor Spider. If you’re a little too far to the side or too close to her and you’ll get hit by this attack. The third and final attack she does from melee range is her explosion. The second you see fire in her mouth you need to start running away from her straight to the fog gate and wait for the fire to dissipate.
The Armor Spider is weak to magic! Be sure to use Sticky White Slime to buff your weapon with extra magic damage or use the Crescent Falchion found in World 4-1. Also, if you have any magic spells, they will do massive damage against her. If you want to block the Armor Spider’s attacks instead of rolling, you should use a shield with high fire resistance (Purple Flame Shield, Large Brushwood Shield, Tower Shield). The easiest strategy to defeat the Armor Spider is to use a bow or magic and hug the left side of the tunnel. Make sure you have lots of arrows ready to go and fire away. The only attack that will hit you is the web shot, but just roll through it or tank it and heal up with grass when necessary. After the Armor Spider is defeated, you will receive the Hard Demon’s Soul and Pure Spiderstone. The soul can be used to create the Lava Bow, one of the strongest bows in the game. It can also be used to learn the spells Fire Spray from Sage Freke and Ignite from Yuria. For more expert help, check out our full page of Demon’s Souls Boss guides, here.