mtg removal cards Lorwyn Eclipsed: Guide and all Auras you own attached to attacking creatures your opponents control Remove Soul · Classic Sixth

There are a few hyper-specific cards that care about permanents transforming, like Corruption of Towashi and Cult of the Waxing Moon, but none that are too competitive in Commander

Effects like the Historic banned Spreading Seas can fix this and, since Islandwalk is a recurring mechanic across Merfolks, it is probably worthwhile running some effects like that, making Master of the Pearl Trident an absolute menace

Combine this with whites ability to search equipments from your deck with cards like Stoneforge Mystic and Steelshaper Apprentice to find the pieces youre missing

Inside, your community will find classic characters and items, rediscovering their favorite moments from the franchise imagined in a new way