Superman VS The Eradicator (Rebirth)
The Eradicator previously absorbed the life force of Krypto. He did the same thing to Superman but it allowed the Man of Steel to make contact with life forces of the other trapped Kryptonians. He managed to escape with their help which in turn weakened the Eradicator who was used their life forces to boost his strength.
From – Superman Vol. 4 #6