The quest for a -slightly- more unholy grail

Let's be frank, grail sucks right now. Outclassed by Morello's as a mana item for casters who rely on spell spam to deal relevant damage. I'm certain some people are quite happy with this, considering that it used to be an item you could buy to forget about your mana pool. That's not something I think needs to come back, it's a bit of a bad concept, even if some of my favorite champions greatly benefited from it. Anthene's unholy grail should be made a decent item that's worth buying, and as such, it should be given something that differentiates it from the rest of the mana/cdr/ap/ items.

Now, we ask ourselves, why, exactly, is anthene's an unholy grail? Clearly, it's a grail filled with blood. It's omnious, cultish, malevolent. If I had to guess, it looked like it was a sacrificial artifact of sorts.

I think you get where I'm going with this.

I propose, that in order to make Anthene's a more thematically complete item, that is also a viable choice, that it should be given an active ability, one that allows the user to sacrifice a portion of their HP for a buff. Maybe a toggle, but I think an active ability with a cost would be easier to balance.

I wouldn't quite know what this active would be. It should be something that is obviously geared for sustained damage mages, so i think a damage amp is a bit out of the question, otherwise it'd just be a slightly different version of DFG with a health cost. Perhaps a Cooldown reduction/mana buff? Something that applied bonus cooldown reduction that ignored the cap would be pretty fly, if you asked me.

Maybe I'm iffy on the details, but I think this is an idea that could genuinely give help to an item that got slammed, as well as providing a nice thematic touch to the item.

Thoughts?