Sundial of the Exiled

Source
This item can be purchased in Dalaran for from:

Effective Spell Power
The effective Spell Power granted by this trinket is calculated as a function of cast-time. Essentially, to get the most out of this trinket, you want shorter cast times. The formula for calculating the amount of effective +Spell Power granted by this item is -

E = 590 * 10 / (45 + (t / 0.10)))

Where...

E = effective +Spell Power t = cast time

The following Java Program can be used to obtaina table of effective +Spell Power for different casting speeds:

public static void main(String[] args) {       float time; float effective; for(time = 1; time < 6.5f; time += 0.5f) {               effective = 590 * 10 / (45 + (time / 0.10f)); System.out.println(" " + time + " " + effective + "  "); }   } This gives the results below: