A sandy lover of this here website,
only did the Foxtrot once, when they weren't on.
Their favourite colour was that of a magical swamp,
where they found a crystal that controlled time.
They watched TV and saw Judy, Rinder, and Dredd.
And when they accessed a Malaysian website,
they kept a promise, in sickness, and in health.
Each line of this seemingly nonsense story is a clue to a word.
These words form a sentence.
Can you tell me what this sentence is, and what's special about it?