I like this idea. I think that the last card is massively overpowered, you get it really fast and it's much stronger than Hireling, which you often get later. This is a really strong opener, giving you a clean shuffle after round 4, and picks you up a 5 cost engine piece round 5-7, which then becomes superpowered once you get some + Card Champions cards in play. Also the card #2 should be an Attack.
Also, last-level Travellers (well, threy're not really Travellers themselves but whatever) don't need to be permanent Durations, and permanent Durations don't need to be at the end of a Traveller line.