mtg goblin commander precon Goblinstorm The new Goblin Storm commander

Dual Lands The original dual lands like Volcanic Island, Underground Sea, Tundra, Badlands, and the rest are the gold standard for mana fixing in cEDH

Well, in that case, you get to enjoy Flynns full four-lore value

Mephitic Ooze Darksteel s Mephitic Ooze cares about artifacts, which makes a lot more sense when you remember the name of the MTG set it came from

Even if you play her for 5 mana and simply use the first active ability, it's still worthwhile as the solid planeswalker and a 6/6 creature token in a single turn are both great

Most formats have a banned list of some kind

Belbes Portal is a fantastic cost reducer, effectively letting you cheat a creature into play every turn for three mana