Idea for a new tank item in the Tear of the Goddess family

A Tear of the Goddess item, but for tanks. Perhaps some sort of cloak or chest plate. I imagine it would accumulate from spell casts, and possibly being hit by champions (possibly limited to autos or abilities, but that could cause some unfair interactions).

The passive could give you a health boost, or maybe even extra tenacity up to a cap, based on your mana. The active would burn a % of your max mana, and heal you a certain amount based on the mana used. The ratio should be based on bonus health or resistances so that it discourages carries from building it. Plus, the new change that only lets you get 1 tear item (currently just and ) would further discourage carries from building this. They would benefit more from the 's damage or th's shield.

Obviously there will be different opinions/ideas for a new item for tanks, but I feel like this (or a tank item in general) would fit the game. Especially for some champions who build CDR tank, and end up building a lot of mana with items like , , or . I'd be interested in seeing what people think about this.