There are a lot of reasons why it makes a difference.
What is easily overlooked is that it is an essential requirement of a summoning spell that the creature summoned be able to come. With a verser, it's already dicey--the verser doesn't have the ability to travel to a specific other universe, but it is at least arguable that a summoning spell that reaches a verser "while" the verser is in the scriff would draw the verser to the summoner, and similarly arguable that since scriff is outside time, any given verser is "always" there. But a sentient creature that does not have the ability to travel to another universe does not gain that ability by virtue of being summoned; the spellcaster would have to create the gate by which it traveled.
And a non-sentient object cannot be "summoned" at all, because it has no ability of self-determination that can be bent to answer the summons. Since it does as it is programmed, it can't "want" to answer the summons. Thus such a spell constitutes a "snatch", a teleportive skill that pulls an object to the skilled user, and in this case a snatch that reaches across universe barriers. That's a very high biased skill indeed.
It's a high bias for a reason. The reason is that the game is designed to force players to work within the limitations of their present universe.
On reflection, I made the right decision for the wrong reason. It does not really matter whether sentient terminators exist in any universe. They did not exist in the universe in which you were located. To bring one from another universe, you would have to open a gate--a M12@10 skill well above the bias curve established for your game. The alternative would be to bring one from the future--a M15@10 skill if you do it yourself. Your expectation seemed at one point to be that you could summon a terminator from the future and it would travel to the past to protect you. The problems were:
- Terminators do not have the ability to travel through time;
- Summoning spells call creatures capable of coming, but do not provide the means for doing so;
- Terminators in this universe are not sentient and therefore cannot answer a summons;
- If there are terminators in other universes that are sentient, they do not have the ability to cross universe boundaries and thus (unlike angels) cannot respond to a summons from another universe;
- If a terminator were to travel from the future, it would create an anomaly such that you would have to play the universe up to the moment the terminator departed and then revert to replay it from the point the terminator arrived, erasing everything that happened in the now erased history, so you wouldn't see the success of the spell for a long time anyway;
- No magic you could perform had the ability to cross either temporal limitations or universe boundaries.
With that long a list of problems, I was trying to get out of the situation as quickly as possible to move on; you were trying to force it to happen by addressing individual problems to say that my judgment on the matter was wrong.
I don't really have enough time in my day to explain fully every game decision I make, or even to think them all through in this detail. I look for the clues that will give me the fastest answer possible, and go by the seat of my pants. The first reason I saw for it not to work was not the best reason, but it was sufficient. Now I've spent twenty minutes looking at it in more detail just today, and I come to the same conclusion, only more firmly.
John, when a referee says that something doesn't work "because", he's being generous. He really only has to say that it doesn't work. If you make him defend his decision, you alienate him. Yes, you can ask for an explanation; you should not then tell him that the explanation is flawed, because it is his explanation, and if it works for him, it's the rule.
--M. J. Young