Worlds of Magic: Planar Conquest (JP)

You can see your current Spellcraft level by selecting the Magic Panel option during your game. Obviously for this trophy you would want to put all of your Power points into Spellcraft so that you can raise it as fast as possible.

Specific buildings within Factions are the only way to increase your Power bonus per turn so build as many as you can. I am not listing them here because there are several and the game will list them in your building summary.

This a very grindy trophy and it is not something you will get naturally. I was able to gain one power level with approximately 120 power per turn. The trophy will immediately unlock once you hit the 100 mark.