The thing about those is that all three of them would be created by taking someone out. As a GM I think I would look at the process to determine which of those applies to the given circumstance (I.E. How much care was taken, the period of time in which it was done) but to be purely technical, the second a player takes someone out with any sort of mind control method they may apply any of those labels to their victim. The take out is theirs to describe (within reason subject to the table) and since they are dealing mental stress then most of those concepts are within reason.
To actually create this spell with ritual you're looking at "Victor Sells' exploding heart spell" but aimed at the mental stress track, and with a different intent. For a WCV? There are a lot of things to look at here, many of their "fine thralls" are really just addicts, and could choose to disobey, but won't because then they won't get their fix. I'm waxing thematic though, and I should stop. Mechanically any time a WCV takes a person out with their feeding they could choose a variety of effects from death to thralldom. Again, as long as the victim has been taken out then it's up to the victor how that works.