I didn't see an answer to this question after a brief search, so I wanted to ask here.
I got in to an argument with my DM tonight. I assume, from the way unseen servant is worded, that I can have as many as I can cast. E.g. every 10 minutes I can summon another one (as a ritual) and just go to town with them.
The DM focused on the wording of the spell, where it says:
This spell creates AN invisible, mindless, shapeless force
and interpreted this as meaning I could only have 1. I assumed this meant that the spell could only create one at a time, but each casting could create another one.
So, who's right? Based on a lot of what I've read online, it is assumed that people can cast many of these to have fun with them. Does this come down to grammar? Is there some rule that makes this official one way or another?