Diablo 4 introduces multiple currencies with names like Aberrant Cinders, Baneful Hearts, and Exquisite Blood. Season 4 of the game, titled Loot Reborn, focuses on giving players more rewards and speeding up leveling. The update also includes changes such as adding manuals with affixes, new crafting materials, pets, and a questline involving Andariel as a summonable boss. The game features intense events called Helltides, which were previously only available in World Tier 3 but are now accessible in every World Tier.