Fire Crystals show up across several systems at once — hero reactivation and advancement chief among them — which makes them easy to spend without a clear plan.
Know what you're reactivating before you spend
Reactivation-style Fire Crystal costs typically scale with how far you're pushing, so committing crystals to a hero or system without a target end-state in mind usually means overspending relative to the benefit gained at each step.
Prioritize crystals toward heroes you're actually using
The same rule that applies to shards applies here: concentrated investment in a hero that fills a real role in your roster beats spread-thin investment across many. Check our Hero Tier List guide for how to think about which heroes deserve that investment.
Watch for event-based crystal value boosts
Fire Crystal-focused events and shop rotations periodically offer better exchange value than the default rate — if you're not in a rush, waiting for one of these windows before a big crystal spend is usually worth it.
Don't let crystals sit unused indefinitely
Unlike some resources, there's rarely a good reason to stockpile Fire Crystals for a long time once you have a clear next target — sitting on them provides no benefit over spending them toward your current priority hero or system.
