Armor Armor reduces physical damage received.

Haste increases attack and spell casting speed, adds additional damage and healing to DoTs and HoTs, and reduces the GCD. Also, Haste increases your Rune regeneration speed.

Mastery provides a passive bonus to your character based on your specialization. Mastery Blood Shield provides an absorption shield with every Death Strike.

Stamina increases your total health.

Versatility increases your damage, healing, and absorption done and decreases damage received.

Critical Strike increase the chance for your spells and attacks to critically hit for additional damage and healing. As Blood, Crit also increases your chance to Parry via Riposte.