Its a gift as well, makes you able to change things by force of will at the Spirit World. Like making a mountain easier to climb, a pond to appear when you are thirsty, etc. Remember the Spirit World is just a mirror of urself. If u are slaved to the Shadow, it will bring only nightmares, if u are a wise, focused and balanced craeture, u have nothing to fear from it, u can actually enjoy such powers. Nothing to conquer the world, but to make urself comfortable, mostly.
For Seeming, check the handbook about birthright monsters, dont remmeber exactly the name (not the scions one, but 'normal' monsters)