Ironclad has some ways to make massive amounts of energy, like Bloodletting+, Expect a Fight, Forgotten Ritual, and Offering. Sometimes Relics might provide a lot as well. Cascade is an awesome way to spend that energy. One way that Cascade is interesting to me is that it rewards you for putting high-impact cards in your deck, while punishing you for putting cards like Anger into it. Keep this in mind when considering whether your deck currently wants the card.
