Hammer of Purphoros

Two effects share a frame here, and the second one is the reason the first survives. Anthem-style haste enablers had appeared before in Fervor and Fires of Yavimaya, but those cards do nothing once the board is empty and the topdeck is a land. The land-sacrifice golem clause answers that exact failure: when the haste grant has no creatures left to push, the card becomes its own threat generator, turning surplus lands into a steady stream of 3/3 bodies that themselves arrive ready to attack. The mana cost on the activation is real friction; spending and a land per token means you trade your long-game resource (mana) for immediate pressure, which is precisely the deal a red deck wants to make when it is ahead and precisely the one that bankrupts it if the plan stalls. The legendary tag and the enchantment artifact type line are doing quieter work, gesturing at the god-forging flavor of its origin while making it more vulnerable to the wide net of artifact and enchantment removal than a comparable enabler printed as a pure enchantment would be. What makes the design hold together is that neither half is dead weight: early, it is a global haste lord that closes games faster; late, it is a mana sink that refuses to let a flooded hand go quiet.