The last ability gives you a discount on spells you cast from anywhere other than your hand, including the top of the library
Brokers Confluence The Brokers from Streets of New Capenna were largely built with their shield counter mechanic in mind, so it makes sense to see proliferate on Brokers Confluence
It plays closer to a modern-style Burn deck with synergy-heavy goblins
Geth, Lord of the Vault is a six mana 5/5 with intimidate, which means it cant be blocked by anything that isnt Black or an Artifact, which is like fear, but not specifically for Black Creatures
Of course, good players can bluff, but its still useful to consider if they have the resources for a counter
while others came and went that I had some expectation for, it just looked better and better