No, the Ring of Spell Turning does not work on spells that target more than one creature for any reason
you have advantage on saving throw against any spell that targets only you (not in an area of effect)
So the ring gives you advantage on saves from spells that only target you but that is not an area of effect.
A typical spell requires you to pick one or more targets to be affected by the spell's magic. A spell's description tells you whether the spell targets creatures, objects, or a point of origin for an area of effect (described below).
Many spells can target multiple creatures in their effects and these are not considered to be targeting an area.
If a spell like hold person, which targets creatures and not an area, is upcast such that it allows an additional target then that spell is now targeting more than one person. Thus, the Ring of Spell Turning will not grant advantage against it.
When you cast this spell using a spell slot of 3rd level or higher, you can target one additional humanoid for each slot level above 2nd
Jeremy Crawford has confirmed that up casting a spell would indeed increase the number of creatures targeted by that spell:
Can a spell at its current level target more than one creature? If yes, you can't twin it.
This is in reference to the twinned spell restriction that says:
When you Cast a Spell that Targets only one creature and doesn’t have a range of self...
Crawford says that upcast spells that target more than one person cannot be twinned. That means that spells that are upcast that target more than one person do indeed count as one spell that is targeting more than one creature.
Going back to the question at hand, this means that an upcast spell that targets more than one creature definitely will NOT be a spell on which the ring will give you advantage.
Regarding a twinned spell:
...you can spend a number of sorcery points equal to the spell’s level to target a second creature in range...
The untwinned or not upcast versions of the spell may only target one creature, but upcasting or twinning them causes that spell to target more than one creature.
Thus, regardless of the reason, if the spell does not target only, then it is not affected by the ring. This is the case with hold person in both upcast and twinned varieties.
Getting technical with the wording, my interpretation would be as follows.
Both Teleportation Circle and Drawmij Instant Summons would work, I don't think Leomund's would.
Teleportation Circle:
Casting into the object would require you to draw the circle with a 'particular' destination in mind since you are required to expend the components to put the spell into a ring of spell storing.
Later when you activated the ring, 'a shimmering portal' would open up within that circle that you drew. Limited use in my opinion, but by raw wording that's my interpretation.
As you cast the spell, you draw a 10-foot-diameter circle on the
ground inscribed with sigils that link your location to a permanent
teleportation circle of your choice whose sigil sequence you know and
that is on the same plane of existence as you. A shimmering portal
opens within the circle you drew and remains open until the end of
your next turn.
Creating the circle to a specific destination is part of casting the spell. The actual portal that appears is part of activating the spell.
Drawmij Instant Summons:
In my interpretation this works off of the same concept. You have to present the sapphire at the time of casting the spell into the ring. The spell is put into the ring. When you activate the ring, the magic triggers thereby putting an invisible mark on the item you touch at which time inscribes the name of the item onto the sapphire regardless of where it's at. This is only true because of the wording of the spell.
You touch an object weighing 10 pounds or less whose longest dimension
is 6 feet or less. The spell leaves an invisible mark on its surface
and invisibly inscribes the name of the item on the sapphire you use
as the material component
You used the sapphire at the time of casting the spell into the ring.
Leomund's Secret Chest
While both items are considered material components that could be ignored by a ring of spell storing. The spell explicitly calls out in the spell description that you must touch both the chest and the replica.
You hide a chest and its contents on the Ethereal Plane. You must
touch the chest and the miniature replica.
(I'm pretty sure 90% of spells with gp cost don't do this). As such this is a case of the specific text of the spell ultimately preventing the spell from being used by any of the above magic items you've listed without also having the item at the time of casting.
Practical Uses
Uses
Of the three Drawmjii's has the most practical use:
- Discreetly marking an item for later 'procurement'.
- Discreetly marking an item an enemy is wearing. Crush the sapphire and learn 'who' they are. Essentially weed out an alias.
- Discreetly marking an item an enemy is wearing. Crush the sapphire and learn 'roughly where' they are. (This has no plane restriction.) Used correctly this could simply be used to track down an enemy hideout/base or just keep the hunt going for a person that has escaped.
If another creature is holding or carrying the item, crushing the sapphire doesn’t transport the item to you, but instead you learn who the creature possessing the object is and roughly where that creature is located at that moment.
Logical Reasoning
My interpretations are based on RAW readings of the spell and ring. You could of course house rule an option to magically transport the components into a ring. But that would have to be universal to all three to be concistent.
Best Answer
The Ring of Spell Turning states:
So this means, the spell does not originate from you even when you have returned it, but instead you merely redirect the target. This means that it is as if the cleric used command on themselves using the word "Flee."
This is the effect of the "Flee" command word:
Therefore, the cleric is commanding themselves to flee from themselves. This is a contradiction -- you cannot possibly move away from yourself. However, the command spell also stipulates:
So in this case, the spell would end immediately, since the cleric cannot follow their own command.
This also means that if the spell had a concentration requirement, such as polymorph or banishment, they can willingly end concentration because it is still their spell, they just shot themselves with it instead of you.
Finally, the Ring of Spell Turning cannot return a spell that does not target only you. If command was cast at a higher level such that it targets you and someone else, then you cannot return it. You would also not have advantage on the saving throw.