The Power Rangers Operation Overdrive Season 9 The Lord of Darkness

The Rangers awoke the next morning after a brutal battle with Lord Blagoi. Their base was destroyed and the city faced ruin. All was quiet except for the sounds of destruction and the smell of burned buildings.
Ronnie, the yellow ranger, was the first to emerge from the rubble and began searching for his friends. They all gathered at the place where their base used to be and realized that Lord Blagoi had disappeared again, leaving only cryptic words to return.

Roluz, the pink ranger, said, "We must prepare for the next time Lord Blagoi appears. We must learn more about him and how to defeat him."

Harold appeared and offered his help in the investigation. He said he could find information about Lord Blagoi in ancient texts and artifacts.

The Rangers and their allies, including Flurius, Moltor, Kandor, and Miratrix, decided to join forces. They set out on a mission to learn more about Lord Blagoi's origins and how to defeat him.
Their path led them to an ancient school of magic, where Harold found old manuscripts about Lord Blagoi. From them they learned that Lord Blagoi was once a good wizard, but was expelled from the school for dangerous experiments.

In the days that followed, they learned of the secret powers that Lord Blagoi sought and how they could prevent him. The battle against Lord Blagoi was approaching again, and this time the rangers were prepared to protect the world from dark magic.