See Challenge # 139.

Oh yes, that's the perfect effect for this name.

­Gruul Charm suggests getting ownership back is usually G/R, not UB (which are good colours for stealing ownership). It's also really narrow, against most decks it won't do anything at all unless it's part of a dedicated "exchange control" combo in some way. Maybe tack on a card-draw cantrip?

A cantrip is probably a good idea. I'm thinking about the card colrs, however - what do you think about a green mana and a black/red hybrid mana?

What do you want to achieve with the colours? Having multiple required colours on a cheap spell makes it harder to cast, whereas a niche card like this I think is most interesting in as many decks as possible, so I'd put it in a single colour (or possibly RG hybrid, in a set which is happy with niche hybrid cards). If it could go in multiple colours, I think it's generally best to just pick one. But is there another reason for it?

I just realized black doesn't have much to do with this, so gruul it is.

So much worse than Brand.

Flavourwise I can see it in any colour: W/G "restore fairness", RB "hands off, mine!", U "change control". I'm not sure if there's a balance reason its in G/R, but I generally think it's easiest to stick to the established colours unless there's a really good reason to change.

Ub get the real mind control effects, so their enemies Rg get the answer.

I would like to think this is a much better card now. It's now balanced against Brand by only hitting one permanent and cantripping.

Seems good.