You should mulligan, looking for something better with six cards
As you are trying to ramp these are generally only good when you have a land heavy hand or you have already ramped to your upper CMC cap
The cards are exciting, the idea for the Illumineers Quest was innovative and appealing to a broad range of players/collectors, and extra touch went into this sets Trove to make it ultra themed to the set
If so it should sit at the top of this list however it is an incredibly tough card to evaluate so I will need to do some significant testing before I insert the Promised End into this list
Plus it sounds way cooler
Whether thats a Clue, Food, or Treasure, or Brudiclad, or Thopter Assembly, or Wurmcoil Engine once you Thop, you cant stop