Couple of new item ideas with never before seen passives... thoughts?
 

Long Sword (+10 AD) 400 + Ruby Crystal (+180 Health) 475 + Cloth Armor (+15 armor) 300

Staff of Life: 325 combine cost + 1175 = 1500

+10 AD
+200 Health
+15 armor

UNIQUE Passive: If you would take lethal damage, you first gain a shield that blocks 10% of the incoming damage and heals you for half. 90 second cooldown.
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Staff of Life (1500) + Giant's Belt (+400 Health) 1000 + Chain Vest (+40 armor) 720

Pale Reflection: 480 combine cost + 3220 = 3700

+15 AD
+750 Health
+65 Armor

UNIQUE Passive: If you would take lethal damage, you first gain a shield that blocks 20% of the incoming damage, heals you for 5%, and reflects 5% in a 900 radius around you. 90 second cooldown.

The AD is totally superfluous here. Who the hell wants 15 AD? That said, I dont think Tanks are suffering enough to warrant the existence of this item.

tl;dr: No.

Seems kind of like Hexdrinker for AD. It is also kind of confusing since blocking 20% of lethal damage = death in most cases. If I have 100 HP and would take 300 Damage, I'm probably dead even if I can block 20% incoming damage + heal for 5% of health + reflect 5% of damage. 20% of incoming damage would be around 60. 5% of health of a 1.5k HP character would be 75. Reflect 5% incoming damage would be 15.

Better to write if low HP, then have a shield that absorbs damage equal to Flat Amount or %Max Health.

Yup, I agree with FlowyS, something like Hexdrinker but then for physical damage.