Level 51 Warriors receive no disciplines at level 51. This discipline allows a warrior to take less damage in melee combat. The disadvantage is that they will also do less damage themselves. The duration is a lengthy 3 minutes compared to a 15 minute base reuse delay. In my opinion this is an extremely useful skill.
Warriors are tanks first and are the best tanks in the game.
This skill allows them to be more effective at what they do best. The charge discipline will cause all attacks to land for 14 seconds. This does not affect the damage output of these attacks but it does mean that you will land much more often than normal. The base reuse time is 30 minutes. This can be a great damage disher.