How does that work in DCC/MCC? The reason I ask I had envisioned this as a surprise "attack" from an unexpected source. But if there's no such thing as "surprise," or it wouldn't work in this situation, I'm not sure it makes sense for Kurot to kick off a combat in which he may not even get to go first.If you want to initiate Combat then you need to roll an Initiative die.
It's also weird that his freakish speed seems to do nothing to help with initiative, but such are rules systems.