Name: Following the Pattern
Circles: Earth / Summoning
Description: The construction of any building that you already have in at least 3 cities goes twice as fast.

Notes: in MoM (and in more generally in 4X) cities built/conquered later in the game tend to be not very useful since they take too long to develop, this spell lowers that effect.

This would be cast by me every single game I played with the correct spell circles.