How would an item like this pan out?
Bangle of the Lost Lunari
Kindlegem (800) + Chain Vest (800) + Cloth Armor (300) + 700 = 2600
+300 Health +60 Armor +10% Cooldown Reduction
Unique Aura: Shields that would be applied to nearby enemy champions are 15% weaker.
I just kinda threw the numbers together for the sake of presentation, but the idea is an item for a tank to buy against an enemy team with high shielding capability, to blunt their resilience a bit.
The name is me being cheeky with the item 'opposing' Locket.