What is the Gauntlet and what are special Shadow abilities?

The Gauntlet is a special artifact in your character’s possession. It enables you to perform a unique Execution blow.

The special Shadow abilities are:
1. Mana Regeneration - a special ability that enables you to quickly restore your mana.
2. Vampirism - an ability that partially restores your health. This ability requires mana.
3. Rage Restoration - an ability that enables you to fully restore your rage. This ability requires mana.
4. Execution - a special blow of the Gauntlet. This ability requires rage. This blow is necessary to fight stronger opponents.