Skeleton Mastery is a very important skill if you have any intention of using skeletons to help your Necromancer make it through the game. This skill will dramatically improve the life and damage of Skeletons, Skeleton Mages, and revived monsters.
Appearance of Skeletons
Points invested in Skeleton Mastery will also affect the equipment and/or appearance of Skeletons and Skeleton Mages as they grow stronger, both types transition through several visual stages until reaching their final appearance. Point brackets for these changes are as follows:
0-1 Points : Standard unmodified appearance of both, melee Skeletons wield war picks.
2-3 Points : Melee Skeletons wield axes.
4-5 Points : Both types sprout horns from the side of their skulls, melee Skeletons wield spiked maces.
6 Points : Melee Skeletons wield flails.
7 Points : Both types now wear helmets and tattered armored pants/shorts.
8+ Points : Melee Skeletons now wield curved swords and will sometimes carry kite shields as opposed to their usual round shields.
History
As the Necromancer's knowledge of the undead improves, he is able to harness and divert more powerful spirits to inhabit the corpses of the recently dead. A Necromancer who possesses this skill is able to raise skeletons and skeletal mages of a much more powerful variety.