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This is a sentence for the word, negate.
The adverb form of the verb to negate is negatively.
no fiendish chain most certainly does not negate attacks, if the card does not state it negates an attack it does not negate attacks
Yes it can. Sangan is a triggered effect, Stardust Dragon Assault Mode can chain to and negate it.
You can't negate the fact that George Bush was the worst president. Ever.