Black Apple. DreamTale

Everything

Credits to a DreamTale wiki on google for the backstory

Credits to Jael Peñaloza for the image )

Dream, along with his brother, Nightmare, was conceived from the Tree of Feeling by Nim, to guard it as she's recovering from a deadly battle. She then gave them humanoid forms, but the two exploded as those couldn't withstand the emotional powers that the two emits. In a rush, she then created new skeletal vessels based on the first skeleton monster she observed, Swap Sans. The vessels proves to be effective as the powers flows freely through the bones. She then rest back into the tree as the twin brothers perform their duties.

One day, Dream left the tree to pay his friend, Neil, a visit. However, when he returns, he found the all of the apples turned blacked, and Nightmare surrounded by an angry mob. While Dream tries to calm the mob down, Nightmare was tempted by the spirit of the man that nearly slew their mother to devour the black apple, He did, and the vengeful spirit took over, devouring all of the fruits from the trees save for one.

Dream manage to protect the last Golden Apple, and used it in the vein attempt to defeat the Corruption that took his brother away. But, the Malicious being prevails, and the poor guardian of light was turned to stone. Unable to corrupt the final fruit, the Vengeful being left the realm of feelings after he destroyed the Tree itself..