Heroes Against Hunger was a 1986 one-shot from DC Comics published to raise money for African famine relief.
In a story called “A Song of Pain and Sorrow!”, Superman, Batman, and Lex Luthor try to curtail the Ethiopian famine. While there, they interact with Peace Corps member Lee Ann Layton. Their antagonist is a green-skinned, four-armed giant with a keyboard embedded on his chest called the Master. The Master feeds on entropy, so he is strengthened by the Ethiopian famine.