When taking bullet damage (active or depleted Shield):
Launches Corrosive homing Spikes at attacks.
When melee'd (active or depleted Shield):
Returns Corrosive damage to the attacker.
- Shield PartsFull PartsFull Parts
Base Game - World Drop
Borderlands 2 World Drops are items that drop from any suitable Loot Source in addition to their dedicated sources.
There are 67 unique items in the World Drop pool, so for farming 1 of the 10 shields it's best to seek out its dedicated Loot Source.
If you still want to test your luck, you should equip a Vault Hunter's Relic to indirectly increase your chance of a World Drop Legendary.
Suitable Loot Sources:
Loot Luck Formula
L = Loot Luck
P = Legendary Dedicated Drop Rate
⚙️ Recipe for mentioned chances