Guide
Trusted ManualClan War Leagues (CWL) Medal Spending Guide
Clan War Leagues (CWL) is the most competitive recurring event in Clash of Clans, taking place during the first week of every month. The rewards are CWL Medals, which can be spent in the League Shop.
However, spending your medals incorrectly can cost you weeks of builder time. This guide provides a mathematical analysis of the League Shop to maximize your progression ROI.
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1. Hammers vs. Builder Potions: The Time Math
Let's analyze the exact builder hours saved per medal spent:
- Builder Potion: Costs 15 Medals. Speeds up building by 10x for 1 hour, saving 9 hours per builder.
- If you have 5 Builders: Saves 45 hours.
45 Hours / 15 Medals = 3.0 Hours saved per medal. - If you have 6 Builders: Saves 54 hours.
54 Hours / 15 Medals = 3.6 Hours saved per medal. - Hammer of Building: Costs 120 Medals. Instantly completes any building upgrade, saving 100% of the resource cost.
- If the target upgrade takes 14 Days (336 Hours):
336 Hours / 120 Medals = 2.8 Hours saved per medal. - If the target upgrade takes 18 Days (432 Hours):
432 Hours / 120 Medals = 3.6 Hours saved per medal.
Strategic Conclusion: If you have 6 builders and your target upgrade is shorter than 12 days, buying Builder Potions yields a higher progression rate per medal. If your target upgrade is longer than 14 days, buying a Hammer of Building is mathematically superior and saves millions in gold.
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2. Hammer of Fighting vs. Lab Potions
Laboratory time is often the longest bottleneck in modern Clash:
- A Research Potion costs 20 Medals, saving 23 hours of lab research.
23 / 20 = 1.15 Hours per medal. - A Hammer of Fighting costs 120 Medals. If used on a 14-day (336 Hours) troop upgrade:
336 / 120 = 2.8 Hours per medal. - Conclusion: Always save your CWL Medals for Hammers of Fighting/Spells rather than buying Research Potions for long late-game upgrades.