How is My Mana Surge Calculated?

The formula for Mana surge is as follows: SURGE CHANCE = (MASTERY*0.73) / (MASTERY+62)

This is called a "diminishing returns" formula... it means that as you get more and more mastery, the INCREASE in surge chance goes down. For example, 25 mastery points give about a 20% surge chance, but if we double that to 50 mastery points, we now only see a surge chance of a about 32%. The Gems of War system really starts to slow down around 60% as you can see in the graph.

Formulae like this are used in games to avoid imbalances for players at the end-game. An example of a game that uses a similar formula is League of Legends, with its damage reductions from Armor & Magic Resistance.

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