dark samus
A being of Phazon taking on the shape of Samus Aran. She made a brief cameo appearance in the secret ending of Metroid Prime, was a central character in Metroid Prime 2: Echoes, and was the main antagonist in Metroid Prime 3: Corruption.
After Samus defeated the Metroid Prime on Tallon IV by absorbing Phazon and using it as a weapon against Metroid Prime, the creature began to destabilize, and in a desperate move, it absorbed her Phazon Suit and subsequently exploded. As Samus left the planet, a new creature was born from Samus' DNA and the remains of Metroid Prime, using Samus' Phazon Suit as a mold to contain its new body - the creature known as Dark Samus.