Lavan is a villain in the 1986 My Little Pony 'n Friends cartoon series, a malevolent lava demon who kidnaps the Princess Ponies and steals their magic wands, since they contain all the magic in Ponyland.
He tried to use them to transform himself into an all-powerful crystal being. At first it didn't work, instead upsetting the balance of Ponyland. He then kidnapped the six Princess Ponies (except Princess Tiffany who flew away) and ordered his minions to throw the Princess Ponies into a lava pit, but they escaped. Lavan began his crystal transformation but was informed by his henchman Sludge that they escaped. Lavan attacked him, and later found Spike, the Princess Ponies, and his enemy Gnash, and imprisoned them in the dungeon, from which they were released by Sludge, who was tired of Lavan's abuse.
While Lavan's abuse of the wands began turning Ponyland to crystal, Lavan completed his crystal transformation. When the Princess Ponies found the wands, drained of power, Lavan attacked them, but they escaped after Princess Tiffany and Megan Williams arrived. They found the Heart of Ponyland, which was used to recharge the wands, but Lavan attacked them. Sludge knocked him into the lava, from which he re-emerged only to be frozen by Gnash. By the time he broke free, the Princess Ponies had their wands back. Working together, they used their magic to send Lavan's rainbow beam back at him, destroying him.