New Support Item Concept

I don't really have a name for it yet, but I was thinking about an item that doesn't really exist yet, an item that buffs ally turrets.

So I was thinking something along the lines of:

[New Item]
+300 Health
+40 Armor
+30 Magic Resist
+150% Base Health Regen

UNIQUE PASSIVE - Sanctuary: Gain 30% bonus Movement Speed and 100% Base Health Regen for 10 seconds while standing near Ally turrets, fallen turrets, and Void Gates. This ability refreshes after 30 seconds or if taking damage from enemy champion while near an ally turret.

UNIQUE ACTIVE - Strength of Stone: Grants a shield to an ally turret for 10 seconds that absorbs up to 80 (+5 per Level) + 10% of your maximum health and a bonus 10 shield for each ally champion within the Turrets Range at activation of this ability. (150 second cooldown). This effect can not be used on the same turret more than once every 10 seconds.

This item builds out of Spectres Cowl and Raptor's Cloak.

If you have any way to improve this item I would love to get any feedback, I have no name for the item as of yet, so I am also open to name ideas.