Defense Shield I
Strengthen the overall defensive power of troops.
Research Levels
| Level | Value | Power | Prerequisites | Cost | Research Time |
|---|---|---|---|---|---|
| 1 | 3% | 1K |  35K 35K 35K 35K | 4h 51m 40s | |
| 2 | 6% | 3K | 70K70K70K70K | 9h 43m 20s | |
| 3 | 9% | 7K | 140K140K140K140K | 19h 26m 40s | |
| 4 | 12% | 15K | 280K280K280K280K | 1d 14h 53m |
