Warlock Subclass: Pact of the Kindred- The Power of Legacy

[Wraith]

I like the concept - its nice to see a Warlock Patron who isn't typically antagonistic or necessarily threatening, like Demons or Cthulhu, but has a lot more scope for more open-ended interpretation.

The only small piece of critique that I would like to offer is in the wording of Ethereal Bonds: "You gain the ability to see 30 ft. into the Ethereal Plane." What does this mean, mechanically? Specifically, what does it do? You can see into the Ethereal Plane, but why is that a benefit to the character?

I would guess the implication is that you can now see invisible creatures, as well as seeing people who are travelling through the Ethereal Plane (via astral projection, teleportation, or just walking around after Plane Shifting, etc), but I think it would read more cleanly with a small description of the mechanics.