I like the idea of soft weapon/shield control (permanents in general)
I also like the idea of alternatively using
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which makes sense to hasten the process.
Quite clever,
I spoiled the spoiler ( I laughed at that
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) and I think it is fine, functionally, they don't differ too much and I think it would be better to keep them both together.
Making another card would have brought this one to mind and would be a waste.
Also "Rustify" is not really a word ( as far as I know),
Oxidize is a much better name imo.EDIT: Dammnit ODIN don't ninja me!!!
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and there is no problem with naming both unupped and upped the same.
(It is your choice of course)
I think you should however change upped to a similar effect as unupped,
"Cannot use ability for X turns" or "cannot use ability/lowers damage further" for example.
Nice idea though
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EDIT 2: LOL Odin! xD