New AD + Armor Item

I'm going to ask you to do something. Head to Game Info, and go to the Items section. Filter the search to items with AD and MR; you should see Hexdrinker, Maw of Malmortius, and Mercurial Scimitar. Next, search for AP and MR; you should see Abyssal Scepter, Athene's Unholy Grail, Banner of Command, and Moonflair Spellblade. Now look for AP and Armor; you'll see Iceborn Gauntlet, Moonflair Spellblade (again), Seeker's Armguard, Wooglet's Witchcap, and Zhonya's Hourglass. Now make a search for items with AD and Armor.

You'll notice something odd. Instead of showing items, the Item Grid says only 'No items match your criteria'.

Eh?

What's so toxic about combining Attack Damage and Armor? Does it restrict build diversity for bruisers by making the item 'must-buy' unless the enemy team has a serious lack of physical damage?

In any case, I've come up with an item concept to fill the 'AD/Armor' void. It's called 'The Radiant Impaler' in honor of Atma's Impaler, but also to contrast with The Black Cleaver. (It has a passive that is, essentially, a defensive version of BC's passive)

THE RADIANT IMPALER +50 Attack Damage +50 Armor

UNIQUE Passive: Dealing physical damage to an enemy champion increases your Armor by 5% for 6 seconds (stacks up to 6 times, up to 30%).

Build Path: B.F. Sword (1550) + Chain Vest (750) + 400 Gold = The Radiant Impaler (2700)

Edit: Swapped out the original for a new idea I had. Old one reduced enemy Attack Damage by 5% instead.

This item gives AD equal to a B.F. Sword (It builds out of it), and Armor a bit higher than that of a Chain Vest. Its passive is a defensive version of Black Cleaver's passive. It's possible that bruisers would build both Black Cleaver AND Radiant Impaler, which on someone like Renekton could be overbearing. Still, you've got APC's. Radiant Impaler doesn't do crap against an APC.

What do you think?

Edit: Alright, so people don't like it. The whole top lane tank slapfest thing, ADC's building it, etc. I get it. Guess that leaves me with only one option.

What would be better?

Edit: CrazedPorcupine's idea for a tank-oriented item, edited very slightly.

NATURA SHIELD +35 Attack Damage (15 Less) +50 Armor (Same)

UNIQUE Passive: Upon entering a bush, you become shielded for 60-240 health(based on level). This shield lasts up to 2 seconds, and cannot be activated more than once every 5 seconds.

Build Path: Pickaxe (875) + Chain Vest (750) +875 Gold = Natura Shield (2500)

Edit: Critmaster Garen's idea, based partially on my 30% Armor-granting variation on the original.

THE RADIANT IMPALER +50 Attack Damage (Same) +50 Armor (Same)

UNIQUE Passive: While in combat, you gain 1% of your Armor each second, maxing at 10% after ten seconds.

Maybe a price reduction is in line here. How about Pickaxe + Chain Vest + 875 Gold = The Radiant Impaler (2500)