Greetings.

Magical background -- mostly mages -- got tuned a bit:

-Your resistance towards the types you are proficient in raises as your
essence increases.
-The cost of your spells is somewhat affected by their corresponding essence.
-The effect of power reagents was somewhat decreased.
-You are able to cast major spells without reagents if your corresponding
essence is high enough.

As a bonus, the duration of Iron Will is now increased with high Knowledge of
Mental Defence.

Have a nice day.

-j

(Ps. Wearing the mage staff helps with the bonuses.)