Another variation on the new Invitation card. Tight-Lipped is a placeholder for Invitation since it is not in the EWC database yet. Swap these cards to play the deck.
I haven't decided if pure Xenan or three-faction is the stronger deck, but both are very viable. I would recommend either deck if you want to play something significantly different than the current meta.
You generally want to skip playing a unit on your first turn so you have as many to play after Invitation as possible, but in some cases it is worth setting up a unit on turn 1 to act as a sacrifice for Nahid's Faithful. You then have a 6/6 lifesteal unit which is not easy to deal with.