Scarlet Shield is an advanced vampire power that turns blocking into healing. You unlock it by drinking Ambrus's blood, and it is a great pick for players who parry a lot.
Perfect blocks heal you, and higher ranks extend that to some directional blocks and omniblocks. A defensive player can stay topped up through long fights.
Drink Ambrus's blood. Drain him after The Gilded Gauntlet, or pick up the phial from a Blood Guard camp east of the Silty Mug Inn during Xanthe's Recruiters.
Night only.
Rank 1 is already useful. Rank 4 is great if you build around blocking.
Blood Surge
Makes a target explode through their own blood.
Claw Ride
A vampire traversal skill for moving around the rooftops at night.
Crimson Rush
Active powers deal more damage the healthier Coen is.
Mesmerise
Takes control of an enemy's mind so they fight other enemies.