Hasta la Vista™

 is an achievement in and requires one to kill a frozen opponent with a crossbow bolt.

To get it, simply use Northern Wind to freeze the opponent then shoot at them.

Tips

 * Make sure the opponent's health is low enough to freeze them and do a one shot kill. Otherwise, they'll thaw out and you must repeat it.
 * Use only standard bolts. Ones like split bolts don't appear to work towards the achievement.
 * Using freeze enhancements (like Piercing Cold) don't appear to count towards the achievement.
 * While the wording says "opponent" it appears to work against non-hostile creatures as well, like deer.

Trivia

 * the name of the achievement, while just a common phrase in Spanish to mean "bye" or "see you later", later became part of the famous catchphrase "Hasta la Vista, baby" in Terminator 2.