children of discord

When Fluttershy passed, Discord began to change. Unable to deal with losing her, he began making attempts to recreate his old life--including Fluttershy's friends, the Elements of Harmony--with serious consequences.

What resulted from his grief was a set of magic-born, artificial children. Each of them were crafted based on how Discord remembered (and interpreted) the Elements; that, combined with his experimental use of magic, means they barely resemble the Elements at all in both character and ability.

Discord does have one biological child with Fluttershy, though the two currently aren't on speaking terms...