I fully expect to be flamed for this, but I like Focus the way it is. That is how I voted. It got a reasonable and well-deserved nerf with the HP reduction and I like that. It was a needed change. I think it is fine as is, and doesn't need any changes. Most suggested changes would hurt monos and duos a helluva lot more than would hurt rainbows. As far as adding an additional benefit to gravity users/mark, black hole already is the benefit. The main problem here is not with the card itself, but with rainbow's flexibility. If it absolutely has to be change, to go with the spirit of colorless shards, I support the "growing" activation cost. However, with rainbows, a colorless activation cost would be negligible. I would still play it without a thought. A more appropriate change, I think, would be to get black hole card if and only if you have gravity mark. So, in conclusion, I do not support a change, but if a change has to be made, those are what I would hope for.