First, the deck's win condition is based off of the 22 planeswalkers
He can predict storms years before they arrive and can also control the weather around him, but he prefers to let nature take its course while he observes and learns
Even a The Scarab God Commander deck would be a great home for Bloodletter of Aclazotz because it can cause opponents to lose life equal to double the number of zombie creatures you control
Ultimate Green Goblin makes you discard every upkeep, but it gives you a Treasure to compensate for the lost resource
Charms balance themselves by offering small, over-costed effects, with flexibility to make up for the inflated price
He does have a bunch of tags on him, including Villain and Pirate, so maybe that makes him somewhat relevant somehow