Idea for Brand.

Passive - Brand gains 2% max mana every time he kills a unit.

Increase spell costs on all spells by 10-20%

Now either he can't support, or if he does, he needs to really manage his mana well.

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 Or Idea #2 (The more crazy idea.)

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Passive - Brand gains 1 AP every time he kills a unit, maximum of ? AP

Nerf his base damage, and scaling to compensate, making him rely on good CS to have a strong mid/late game.