Celerity
Passive effect
For each level of Celerity your reaction speed improves, allowing you to react in-time with anyone using the same level. This means you are likely to win Initiative in combat.
Active effect
You can burn blood to act extremely quickly, granting you 5 seconds per level of Celerity to act before the world starts moving again. This enables you to escape from a Combat unless an opponent has equal or higher level of Celerity and is thus able to chase you.