User blog comment:LivesByProxy/A Void 'Brood-Mother' / 'Hive-Queen' Champion/@comment-24474109-20151023172051

I've done a champion concept of a void broodmother who's a pure support, but she isn't really like you described it. She's more of a buff/debuff champion which there aren't many in League (old Sona is the only one I can think of right now). She directly grants allies power and/or takes it from enemies.

She's also a shapeshifter like Jayce, Nidalee, and Elise, but still differentiates from them since her abilities in both stances are very similar, but in the one stance she focuses on her allies, in the other stance she focuses on the enemies. And she doesn't gain/lose range.

You can check it out here.