Metroid Prime/Meta Ridley

Tallon Overworld
When you have all twelve artifacts, return to the Artifact Temple.

Artifact Temple
There is a cutscene where the statues shine beams of light into the central pillar, which shoots a beacon into the sky. Apparently the Chozo didn't count on there being a giant pterodactyl cyborg in the area because just then Meta Ridley swoops in and a battle begins.

When the battle is over the statues will have long since have been destroyed. But the energy inside them is still there and they combine together, with help of Chozo spirits, to create a portal into the next area.