Shield Upgrade I
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AQuick answer
Shield Upgrade I has 3 Academy levels. The table below is the per-level resource and time cost, plus the listed power and buff increment at each rank.
Per-level costs
| Level | Food | Wood | Stone | Iron | Gold | Time |
|---|---|---|---|---|---|---|
| 1 | 10,000 | 10,000 | 20,000 | 500 | 600 | 3m 22s |
| 2 | 14,000 | 14,000 | 2,800 | 700 | 840 | 5m 3s |
| 3 | 30,000 | 30,000 | 6,000 | 1,500 | 1,800 | 13m 30s |
Buff and prerequisites
| Level | Buff | Power | Prerequisites |
|---|---|---|---|
| 1 | +1.25% | 5,600 | Academy Lv. 7 Close Combat I Lv. 1 |
| 2 | +1.25% | 5,600 | Academy Lv. 8 Shield Upgrade I Lv. 1 |
| 3 | +1.5% | 6,800 | Academy Lv. 9 Shield Upgrade I Lv. 2 |
Names and costs are in-game labels. We do not copy third-party writeups of what the tech is "for."