Blood knights rule reveal
Nice enough statline.
Riders of ruin is neat, nice little cavalry ability. Bit oddly phrased though. Almost seems like you'l only do damage if you started within 3" of an enemy. Which can't be right. Might be a tad too powerfull though as it effectivly makes them impossible to lock down unless you fill up the entire board.
The kastelai bonusses are neat. Though I can imagine this quickly becoming problematic in certain match-ups. Especially as they can't be locked down into combat. Outmanouvering them is going to be difficult and that might make it far too easy for them to run up to a priority target to get one of these buffs.
Also, their weapon choices are purely cosmetic. Which is new, given how different the two weapons are. Maybe this is part of their effort to streamline rules?