So your goal is to just commit suicide right in front of his face.

Think about that for a second.

You are an evil lord who wants this kingdom. Sent a letter and everything to invite these people into your reign/control. Wait for –what weeks? months?— for an answer, get invited to the middle of a barren field with the two rulers you invited, only for them to open up bottles of wine, drink, then die right there.

Like, I guess you won?