Just picked up a digital copy of Terah: Character Reference Guide and absolutely love it. I so can't wait until the world guide comes out later next month (October). I so want to use a spark mechanist or energeticist either in a Terah game or Pathfinder game (oh the level of fun I could have with that). Granted the level twenty ability of the biologist is just beyond broken (at least in my opinion) but having the ability to "create" any creature is quite unbelievable. I can't wait to sink my teeth into the world guide and really get a picture of this game. A preview or a few page spoiler of the world guide would be awesome, but I am willing to wait for the actual guide to come out next month :D.
