gold energy card pokemon PokeDATA Basic Energy / / SWSH07 Lightning Energy Gold Secret Rare

In order to combo off, we'll need either: 4BB if 1) an opponent controlling a Forest (or Forest dual) and you control a Swamp or 2) you control 5+ Swamps OR 4BBB OR Deal combat damage to a player with Geode Golem to cast Demonlord Belzenlok for free

Moreover, it gives our Dragons Indestructible, which is just insane

Bane of Progress ($7) The Commander Collection: Green foil is $16, and this is a nicer foiling

Maybe its enough that you can make blocks hard, that you can sacrifice your non-fliers in some spots and make use of extra copies of legends, that you can fizzle Declaration in Stone and get extra value against removal