I have a party of 6 level 4's that are pretty beefed up. I let them take a 20 in one stat and start with a feat, plus they have unique magic items because of the story of my game so they can punch way above their weight class. I'm considering throwing this at them, I honestly think they can deal with it and they do a ton of damage, but it would be a pretty tough fight for them. 

 When you find out that in older editions, these could speak, talked philosophy, enjoyed conversing with victims almost as much as eating them, and had half a dozen cool variations .___. Joy, time to Homebrew 5e's job for it again.

This is why one has a team. If someone destroys the tentacle, then another team member can attack from that side with impunity. 

Is that you Travis Willingham?

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I can see a Roper hunting in that way if its' prey is especially tough.

Drop them on the floor and let their own weight break them..easy chewing then.

 Remember, ropers have an intelligence of 7. They aren’t just unintelligent predators, so this wouldn’t just be a useful hunting strategy, it would probably be a no brainer for them.

 

Ropers have frighteningly high Intelligence scores.

It’s as smart as an orc.  Noticeably smarter than a ogre.  There are PCs with 7 Intelligence.

 Lol my barbarians intelligence is only 6

 Is that you Travis Willingham?

Why is it neutral evil. Its a living stalactite it should be unaligned. Just kinda silly. Is it sitting in its cavern a plottin all the evil things its going to do once it can move faster 10 feet per round. Goofy alignments in DnD.

Based on their stats, you wouldn't think that a Roper could be defeated by a lone 3rd level warlock, but they can. The secret to defeating a CR 5 creature in such a manner is the Armor of Agathys spell cast at second level, which deals 10 cold damage to creatures that melee attack the warlock. Roper tendrils have distinct health pools of 10hp and deal no actual damage, so they instantly freeze off when they hit the armor. This leaves the Roper with only its Bite to deal damage, but they have 10 feet of move speed and 5 feet of reach, so any warlock can simply kite them around while dealing damage with any ranged cantrip to slowly but surely whittle down the monster till it dies.

I know you wrote this years ago but for anyone that maybe seeing it now, My players (6 players ave lvl 9.3) will be running into one of these and 8 piercers working together as the arrive at an entrance to the underdark. They are chasing some Drow that have stolen something. Just as they finish up this battle the Drow they are chasing will arrive at the cave they are in and now the party will have to fight off 2 lvl 5 Drow.  Far from impossible but still a challenge.  not meant to be a boss fight. 

Imagine a Roper that thinks it a person

Maybe place more and have them try to rip the players apart. (which usually won't happen but sounds cool)

Freaking evil monster 

is this a mimic cousin?

*sipping*

that's only if you know you will go up against one later(it is technically possible but is very unlikely)

I had in my game this situation. Roper grappled a Bard and Barbarian and reeled them up a bit. Bard cast Dissonent whispers spell and roper failed the saving throw. I ruled that roper tried to move away from bard but since they where grappling by tendrils then roper moved with them. How would you have ruled in this case? Bard at some point also tried to attack the tendril but missed.

It does it that it "can extrude a replacement tendril on its next turn", emphasis on the "a" as in singular. So if you can destroy more tentacles than it can recover, you severly limit it's multiattack.

Aoe is your friend. I just fought one of these and used the dragons breath spell to free me and 2 allies while also damaging the creature itself multiple rounds in a row.

Easy solo encounter for a Level 8 party. less so if there are 2 PCs and 4 ropers. I love my DM.

Nah. Fireball damages the creature, but doesn't destroy or damage individual tendrils. You have to do an attack vs a specific tendril to damage it.

i