How to upgrade modular mines

The upgrading method of special weapons for mines of artillery attack team: combining mines with thunder can synthesize the explosion of special weapons and the wrath of thunder; The combination of mines and incendiary bottles can produce super-strong flame bombs and hellfire.

1. By combining mines with thunder, you can synthesize special weapons, thunder bombs and thunder wrath.

2. By combining mines with incendiary bottles, super-strong flame bombs and hellfire can be synthesized.

3. 1 level, mines can be set around. If they are triggered, they will cause a large-scale explosion.

4. The [strength] and [settable quantity] of mines can be improved by upgrading mines.