Chozo Seal

A Chozo Seal is a gate of Chozo design that controls the levels of dangerous liquid on SR388. They will appear in the forthcoming game Metroid: Samus Returns, a remake of Metroid II: Return of Samus.

The seals appear as large ornamental statues in the background, and feature ten icons, five on each side, representing Metroids. The number of Metroids in a particular area will be indicated by these icons being lit purple. Samus must then explore the area to locate all the Metroids and destroy them, collecting their DNA after each kill. She can then return to the Chozo Seal and upload her collected DNA. After doing so, the Chozo Seal will activate and lower the liquid levels, allowing her to continue to the next area.

In the original Metroid II, these seals were not present; Samus would simply have to kill all Metroids in an area, and the liquid levels would lower with a screen-shaking earthquake.

Website

 * Chozo Seal:"Ancient shrines that lower the level of hazardous liquid nearby after you defeat a certain number of Metroids."

Trivia

 * In all prior Metroid titles that involved the Chozo in some shape or form, there has never been a visually explicit in-game link between the bird race and their creations, the Metroids, until now with the Chozo Seal. In fact, prior to Samus Returns, the only in-game clues between them was that the Metroids on SR388 were mostly found in Chozo ruins during Metroid II. Particularly, the Queen Metroid was located in an ancient laboratory-like structure with a broken Chozo statue inside, a subtle hint at the race's involvement with the deadly species.
 * The first confirmation of a link between the Chozo and the Metroids was in the Metroid Fusion manual, although the Super Metroid manual hinted that they were created by an ancient race.