Okay, um das zu klären, gebe ich euch mal die beiden Texte, auf die ich mich beziehe, im O-Ton:
Summon the Simple Form
At this level of mastery, the conjurer may create simple, inanimate objects. The object cannot have any moving parts and may not be made of multiple materials. For example, the conjurer may summon a steel baton, a lead pipe, a wooden stake or a chunk of granite.
System: Each turn the conjurer wishes to keep the object in existence, another Willpower point must be spent or the object vanishes.
Permanency
At this level, the conjurer no longer needs to pay Willpower costs to keep an object in existence. The object is, as this level's name suggests, permanent, though simple objects are still all that may be created.
System: The player must invest three blood points in an object to make it real.
Ich würde das auf alle Fälle so interpretieren, dass es das Blut des Thaumaturgen sein muss.