Was just thinking about having the ablility to generate/build a powerful and very bright light-source, for use inside a planet and for use in micro dyson-spheres, basicly the mini-sun in Halo 4 that revolves around a enshelled planet.
Considering the only light we have currently is small, and made for rooms.
On another note, one of warp-drives, how about you start the warp-drive and it generates a sun-field (for the effects of null-space on a space-borne hull, and thus making ships need good shields) and increases your speed by x number of blocks for duriation y of power, unless deactivated.
One more thing! Perhaps colliding with an object at above 25 speed generates an explosion at the point of impact, increasing with power the quicker you hit the object?