Temporary life.

Create a simple, unique marking on an inanimate object using your blood to temporarily give it life. The larger the object the more necrotic magic it takes and the longer the spell is used the more toll it takes on the user. Note: This spell does NOT work on corpses or skeletons.
The object in question may gather other, similar materials of its kind to help with mobility. A small boulder may pull large rocks towards it to use as arms and legs like in Legend of Zelda. Where the marking is placed will act as eyes for the creature, allowing it to see it's surroundings. You can, at any time, view what the creature sees and can freely control it, kinda like a drone. If concentration is broken the blood instantly dissolves into blood red sand and falls away, leaving the creature to loose it's life and collapse.
When viewing through the eye, or eyes of the creature a deep purple tint is seen and full night vision is given alongside a small fish eye lens effect no matter what. The marking glows red, the more magic concentrated in the brighter the glow. This spell takes a physical and mental toll on the user since they have to work as the life force for two separate life forms at once. If the object in question is destroyed or the marking is smudged or altered in any way the user takes 1d4 necrotic damage for two rounds alongside going through the mental anguish of dying. If the user is actively viewing or controlling the creature during it's death then they take 1d6 necrotic damage for two rounds and risk light, minor internal bleeding which can lead to the coughing up of blood. 
The creature, when not being controlled is about as smart as a dog and can understand any command commanded by the caster but the caster can make the object more of a robot if wanted. The creature is capable of forming bonds due to it having a magic brain of sorts and having a mental connection with the caster. If the caster performs the spell on the object twice or more the object retains it's memory and thoughts and previous settings from being cast. The smaller the object the less of a toll on the caster and the less intellect setting the less of a toll on the caster.