Atlantis

Launched during a period of strong LEGO growth, Atlantis stands out as a brief but innovative underwater theme that ran from early 2010 to end 2011, introducing six collectible color-coded key elements that became highly sought-after components for collectors completing full Atlantis displays. Although it had a short production run, Atlantis remains popular among collectors due to its distinctive parts, bold color schemes, and unique molded elements, with flagship sets like Portal of Atlantis containing 1007 pieces representing substantial builds for the era. The purple key, included in the later wave, is often considered one of the more desirable variants, highlighting how even small exclusive elements can drive collector interest in discontinued themes.