Maelstrom is the supporting antagonist in the Extinctioners universe, making his first appearance in issue 7 he was the brother of the unicorn known as Unicor - who is the current Monarch of the Garden, a mystical realm where fantastical creatures exist (such as unicorns, phoenixes and griffins).

Unhappy with his position in life Maelstrom formed a dark alliance with Xenif to try and usurp his brother but would soon find himself failing as Xenif proved too powerful to be got rid of - ultimately Maelstrom was defeated but managed to flee to parts unknown.