Tirac

Tirek is a demon with elements of a centaur. He resides in the forbidden Midnight Castle alongside his minions and his loyal servant Scorpan, who he orders to kidnap the ponies of Dream Valley to execute his evil scheme. Tirek wields the Rainbow of Darkness, a powerful sack containing evil magic which corrupts everything it touches.It can even turn the ponies he captured into evil dragons which were used to pull his "Charriot of Darkness" and execute the event called the "Night that Never Ends", on which he will use the Rainbow of Darkness to corrupt Dream Valley and plunge it into chaos. When Tirek takes off in his Chariot of Darkness, Megan grabs the satchel containing the rainbow of darkness, but can't hold on to it. As he was about to release the Rainbow of Darkness, Megan opens the locket to reveal the Rainbow of Light. But it's only a small piece that is soon enveloped in darkness. But the Rainbow of Light starts fighting back, and eventually overpowers the Rainbow of Darkness. He was destroyed by the Rainbow of Light, freeing Scorpan from his spell and turning him back into his human form.