[Taking in Astarion's changing expression as he gazes upon himself for the first time in two centuries, Gale's heart sings; a grin of his own tugs at his mouth, one wide and painfully adoring. He lets Astarion continue looking, filling the void with his voice.]

I could do better with preparation, of course. Perhaps even produce an entire simulacrum, if necessary, though I think devising an enchantment for a mirror would be more practical - and economical, so long as the intended result is the same. Something that could replicate your image as it is, perhaps with a trigger word?

[Oh boy, his mind is turning now.]

However, I hope this gives you a mere taste of what I see when I look at you. How handsome you are. How wonderful.