I never make stupid mistakes. - Destiny Revisited (Merlin/Arthur, McKay/Sheppard, PG-13)
http://lavvyan.livejournal.com/300323.html

It takes Merlin one thousand, three hundred and fifty-seven years to find Arthur. The shock of seeing him again almost makes him forget the cold, dozens of metres beneath the ice; the giddiness makes him light-headed. His name's not Merlin in this incarnation, of course. It's Rodney – at least, Merlin says it's Rodney, because that's better than the other one – and he's not a sorcerer as much as… well, a magician perhaps. Because these days, science is magic, and Merlin has learned so much that of all the people on Earth, he's still among the most powerful.

SGA/Merlin fusion; They're both less innocent than they were a thousand years ago; less trusting, more broken. This time, Merlin is the one who gets called on his behaviour – and it's true, he thinks ruefully, he'd stopped bothering to learn the names of those around him long ago – and Arthur is the one who refuses to leave anyone behind. This time, Merlin is the one saying words like "idiot" and "moron," and Arthur has the stupid ears.

They're both less innocent than they were a thousand years ago; less trusting, more broken. This time, Merlin is the one who gets called on his behavior – and it's true, he thinks ruefully, he'd stopped bothering to learn the names of those around him long ago – and Arthur is the one who refuses to leave anyone behind. This time, Merlin is the one saying words like "idiot" and "moron," and Arthur has the stupid ears.

They're both less innocent than they were a thousand years ago; less trusting, more broken. This time, Merlin is the one who gets called on his behaviour – and it's true, he thinks ruefully, he'd stopped bothering to learn the names of those around him long ago – and Arthur is the one who refuses to leave anyone behind. This time, Merlin is the one saying words like "idiot" and "moron," and Arthur has the stupid ears.

It takes Merlin one thousand, three hundred and fifty-seven years to find Arthur. The shock of seeing him again almost makes him forget the cold, dozens of metres beneath the ice; the giddiness makes him light-headed.

They're both less innocent than they were a thousand years ago; less trusting, more broken. This time, Merlin is the one who gets called on his behaviour – and it's true, he thinks ruefully, he'd stopped bothering to learn the names of those around him long ago – and Arthur is the one who refuses to leave anyone behind. This time, Merlin is the one saying words like "idiot" and "moron," and Arthur has the stupid ears. [~2,600]

SGA/Merlin crossover of amazing WIN.

Summary: They're both less innocent than they were a thousand years ago; less trusting, more broken. This time, Merlin is the one who gets called on his behaviour – and it's true, he thinks ruefully, he'd stopped bothering to learn the names of those around him long ago – and Arthur is the one who refuses to leave anyone behind. This time, Merlin is the one saying words like "idiot" and "moron," and Arthur has the stupid ears. **||** [2.610 words] This doesn't work perfectly, but it works well enough to be intriguing.