Magic Armor Abilities - Spider Bound
Once per day, you can speak a command word to cause your shield to transform into a fiendish spider. The spider's size depends on the type of shield, as shown on the following table.
| Shield | Fiendish Monstrous Spider Size |
| Buckler | Small |
| Light shield | Medium |
| Heavy shield | Large |
| Tower shield | Huge |
The spider follows your mental commands. It remains for 10 rounds or until reduced to 0 hit points, at which point it instantly reverts back to a shield. While the spider is activated, you lose your shield bonus to AC.
Aura: Strong; (DC 21) conjuration
Caster Level: 12th
Requirements: Craft Magic Arms and Armor, Summon Monster I (buckler), Summon Monster II (light shield), Summon Monster IV (heavy shield), Summon Monster VI (tower shield), drow.
Price: +2,500 gp (buckler), +5,000 gp (light shield), +10,000 gp (heavy shield), +15,000 gp (tower shield)
Cost to Create: 1,250 gp, 100 XP, 3 days (buckler); 2,500 gp, 200 XP, 5 days (light shield); 5,000 gp, 400 XP, 10 days (heavy shield); 7,500 gp, 600 X
Drow of the Underdark