conclusion

the ruby floats to the creature/object that the spell is being cast on and object/creature glows red and then turns into a medium humanoid carved out of a giant ruby that will do whatever you say. The humanoid also has a longsword that always hits and does 2d8 fire damage. The humanoid cannot speak and will break if the caster dies. The ruby has 2d100 +12 hit points. If the ruby dies it crumbles into 1 EP