After the "Alchemy" science is studied, the new tab - Alchemy - will appear in the Vault window.
The "Alchemy" science allows:
1. making buildings "perfect";
2. making Artefacts "perfect";
3. stealing magic Crystals.
1. Perfection of buildings#
Some buildings, upgraded to the maximum level, can be perfected."Perfect" buildings have improved parameters and extra features.
For example, "perfect" military buildings produce certain number of units once a day.