Assassin Item Idea: Shield Inhibitor

Was thinking of random ways for Assassin's to try to have a counter to some of the shielding in game and thought of this item concept. Goal is to make an item that could be effective for Assassin's that adcs won't run with. I am just laying down loose ideas about it. Curious to what others would think.

Name: Shield Inhibitor (Melee only) Stats: AD + 30 Cost: TBD Unique Passive: Activating this item causes your next damaging attack (5 second atk window) on an enemy to disable all incoming shielding effects on that target for 3 seconds (Healing/Life Steal not effected). 90 second CD.

Reasoning for item stats: Melee Only - This is for assassin burst characters. Don't want Trist hitting a long range attack and then rocket jumping into an enemy ADC during lane and making Janna feel bad.

AD + 35: Gives assassin's a little bit of the stat they like. Needs to avoid tank stats so it doesn't become a tank item.

For the passive, this does not remove shields all ready on the character. The concept is it rewards you for being able to hit the opponent before the shield provider (self or other) can react in time so that you can burst down your opponent. If a shield is in effect on the enemy, it will prevent additional shields from stacking on top during the 3 second window.

Something like +20% shield dmg to active shields could be a consideration for an always in effect passive.