In most cases, this doesn't make the biggest difference, and it's probably worth playing another support instead
If an effect allows you to spend mana "as though it were mana" of any color or type, that will allow you to spend mana you couldn't otherwise spend, but it won't change what mana you spent to cast the spell
Add those energy cards quickly to damage early and pair them with a Future Booster Energy Capsule for a 0 retreat cost
Itll certainly see testing in Standard, but I predict success for the card in both Modern and Commander as well
Goblin Electromancer's effect reduces only generic mana in the spell's total cost
(ExSpeaking in a loud voice, playing without saying anything, etc.) When you shuffle your deck, make sure to shuffle them sufficiently so that both you and your opponent would not be able to tell the order of the cards