Warrior Defensive Stance Abilities

Defensive Stance reduces the damage taken and damage caused.

Shield Block - Greatly increases chance to block. Only blocks one frontal attack. In addition to reducing the damage taken it also sets up the revenge counter attack combo.
Disarm - If the enemy is using a weapon, a successful use of Disarm will greatly reduce the damage dealt by the target for a short period of time. Long cooldown time.
Taunt - Instant ability that taunts the target. A successful use will draw the attention of the target, causing them to attack you. This should be used regularly to keep the monsters attacking you. This of course requires healers to keep you alive during the battle. Disarm is now subject to diminishing returns in PvP.
Revenge - Instant attack that causes extra damage. Counter attack the enemy for additional damage. This must follow a defensive action. Best used in conjunction with Shield Block.