Whether you use placeholders, try a fully slabbed game, or keep your commander slabbed, there are plenty of ways to incorporate your prized cards into your decks
Of course, this deck doesnt just want to discard cards for the fun of it
Any Goblin deck that aims to win via combat damage will need Vanquisher's Banner, especially since it's more resistant to removal than Goblin lord creatures
It gets cheaper the more birds you control, and when it hits the battlefield, your feathered army fights off an opposing threat
Anyway, enough examples
While X spells don't always thrive there, given the prevalence of "cast without paying its mana cost" effects that like to cast them for zero, many consider ElectrodominanceElectrodominance worth the risk because it allows you to burn an opponent out with all the mana you've acquired from your rituals, then tack another spell on to continue the process for others