Quote from psychossassin96 >>

A tamed one of these at a front door with the words “please wipe your feet” stitched into it, it only activates when someone doesn’t wipe their feet...

Actually, I like the idea of a Rug of Smothering with the words "Please Wipe Your Feet" stitched into it, at the entrance to a complaint department. (No training necessary.)

In one of the campaigns I played in we had to fight 3 of these things surrounding a bag of devouring, and holy crap were they annoying, one of my party members almost died from me critting on a divine smite.

Quote from YoshiGoomba123 >>

Aladdin go bye bye

 I was thinking that as soon as I saw this stat block.

Not sure if this should be in magic items instead . . .

I feel like it should have immunity or at least resistance to bludgeoning damage.

I (as the DM) am combining an Awakened Rug of Smothering, with a 4 ft. x 6 ft. Carpet of Flying, then making it an Expert Sidekick and giving it to my son's Character as his High-Level reward (assuming he survives that long).

I tend to run games on hard mode, and I'm pretty stingy with items at low levels, but then once the character break that level 10 barrier I start weaving in Powerful items and rewards into the story that they can attain. And even though this breaks the sidekick rules, and the awaken rules, and the magic item rules, I think it would be super fun and something he'll never forget. 

"Die blanket of Death!"

-Drax in Avengers: Infinity War

Quote from Sgil >>

I (as the DM) am combining an Awakened Rug of Smothering, with a 4 ft. x 6 ft. Carpet of Flying, then making it an Expert Sidekick and giving it to my son's Character as his High-Level reward (assuming he survives that long).

I tend to run games on hard mode, and I'm pretty stingy with items at low levels, but then once the character break that level 10 barrier I start weaving in Powerful items and rewards into the story that they can attain. And even though this breaks the sidekick rules, and the awaken rules, and the magic item rules, I think it would be super fun and something he'll never forget. 

Sounds awesome, and definitely an item/sidekick with style!

Honestly, the carpet of smothering, with its abilities, should be able to smother fire, that is if it gains resistance to fire.

"Creatures with the ability to sense magic detect the rug’s false magical aura."

This wording is really ambiguous. Does this mean:

1) "You sense whatever falsity the rug is projecting" (for example if it was pretending to be a flying carpet, you sense a transmutation aura, and when it's pretending to be a floor rug you sense nothing?

2) "You sense that there is a false aura here"?

very unclear

I've run into a technical issue that I don't have an answer for. I have a player who didn't realize that the Rug had a party member inside before they stabbed it. Once they realized what they'd done, the dice had already rolled. They stabbed the rug with a poison blade that required a con save. How do I proceed here. What I know.

1.) Rug is immune to poison damage even if it fails the save it takes no damage.

2.)Damage Transfer. While it is grappling a creature, the rug takes only half the damage dealt to it, and the creature grappled by the rug takes the other half.
Player takes half damage no save.

Do I: 
A. let the damage proceed to the player inside if the rug fails the save and takes 0 dmg from its half of the poison damage and let the player take the other half.

B. let the player roll their own save against the poison as the blade comes in contact with them.

If this caught me in the moment, I'd be lost too! But it  interested me, so of course I spent too much time thinking about how I'd rule this. After having a think, I'd rule it as Option B: the grappled character must make their own CON save against the poison.

• Damage Transfer transfers like damage to the grappled creature.
• DMG, pg. 257 says: "A creature that takes piercing or slashing damage from an object coated with poison is exposed to its effects."
• If the dagger attack was 8 points of damage, both the rug and its victim would take 4 points of piercing damage.
• The grappled creature is exposed to the effects of the poison on its own.

So, if I understand correctly....  The rug cannot do any damage to things that can't be grappled? As it only does damage to things it has grappled, on their turn?

Since their smothering doesn't do any immediate or initial damage

yes YoshiGoomba Aladdin go bye bye

I am re desiging this as a cape of smothering and putting the Cape of Billowing effect on it to see if my bard takes the bite. If he does it will be interesting when the cape decides to animate during a battle.

Quote from Hanzalf >>

I'm guessing a character named "Dyson" would have advantage against this construct.

 What's that a reference to?

I casually mentioned the existence of these to my players, and now they are constantly paranoid of furniture. Bwah ha ha!

I feel like it should have a flying speed, to fit more into the “murderous flying carpet” sort of theme.

Quote from psychossassin96 >>

A tamed one of these at a front door with the words “please wipe your feet” stitched into it, it only activates when someone doesn’t wipe their feet...

 “please wipe your feet…OR ELSE”

The question is, whose house is it? And why do they want people’s feet to be clean so much? PTSD from the party being slaughtered by mud mephits? Overly zealous Order domain Cleric? Chaotic Neutral Prankster? Some ancient wizard so utterly tired of cleaning after having a bagillion kids over the centuries? An artificer that simply couldn’t think of any other application for his experimental Rug of Smothering?

This is the alternate ending of Aladdin