PHB pg. 191, under "Flying Movement": If a flying creature is knocked prone, has its speed reduced to 0, or is otherwise deprived of the ability to move, the creature falls, unless it has the ability to hover or is being held aloft by magic, such as by the fly spell.
Though probably open to some DM interpretation, most dragons don't use spells to fly, and so, if they are knocked prone, or have their speed reduced to 0, they fall.
Method A (the one I used Monday to kill two dragons...probably wyrmlings...): Sleep: 5d8 "damage" (+2d8/level), no saving throw, no concentration requirement, 90-110 ft. range. Though only useful late in the battle, the "it just works" quality of the spell, plus the ability to ramp it up, means that by about round 3-4, it's typically worth the gamble, even on a Legendary dragon. Arguably, as a wild sorcerer, less "efficient" than a chromatic orb tossed with advantage, but VERY reliable. This translates into Xd6 falling damage for the dragon, and if they're weak enough to be affected by sleep, they're weak enough to have that be a considerable risk.
Method B (one I used against a dragon while fighting it in the air on dragon-back myself): Hypnotic Pattern sets the target's speed to 0. Most dragons are not immune to charm. In conjunction with Bend Luck and Heighten Spell as a wild sorcerer, and they've gotta get lucky to resist that bad boy. While I wouldn't use this against a Legendary dragon without softening it up first, it has dealt 20d6 to a dragon before...and while that didn't kill it, it DID take it out of the fight long enough for us to mop up the other dragons we were fighting.
Also, I'm thinking of buying nets or getting some things of flying onto our party warriors, since both nets (for the smaller dragons) and "shoving" with a melee attack would do the same thing, but they're both a little limited and our party warriors usually just want to stab things to death, and it's hard to fault them for that.
Polymorph has not been the most reliable for that - while it would probably work, the long duration and the high-level slot (I'm only 7th level!) and the limited range means that usually I'm using that spell more defensively, to stop creatures from taking actions that are awful for the party. I've shut up two Banshees, and turned a Beholder into a bee, and in both cases it was more important to keep them transformed than to simply deal damage to them. One full party readied action later, the banshees and beholders get hit with 7 attack actions, which, with the amount Extra Attacks in the party, is oddly more damaging than a 200-ft. fall.
The part about Polymorph that I think is hilarious is that it lasts for up to an hour, so, as I pointed out the the party, we could take a short rest while we have that banshee-pig hog-tied to a post and kill it afterwards. But the main point was to stop it from screaming.
I haven't bothered to learn Hold Person yet, and I might not....between Sleep and Hypnotic Pattern, it almost seems redundant, and wouldn't even work on dragons!
My gnome has taken to calling himself "The Herald of the Rain of Evil Dragons" with a menacing look in his eye. The fact that others here that as "reign" just adds to the humor.
Celtavian said:Polymorphing incorporeal creatures seems so strange. That would be an effective way to cause it pain from a long fall if you transformed it into a creature with few hit points.
Read more: http://www.enworld.org/forum/showth...evels-and-a-dragon-fight/page30#ixzz3a57okImv
Wyrmlings. So much easier to kill. Fought young dragons. Five at once. And Adults. The young ones aren't too bad except the massed breath weapons are nasty. The adults don't go down easy.
I'm glad that shoving stuff doesn't work on the largest dragons. That would be absurd.
Polymorphing incorporeal creatures seems so strange. That would be an effective way to cause it pain from a long fall if you transformed it into a creature with few hit points.
Yeah, sleep still works as a finisher, even against wyrms, because it is SUPER-reliable, but you do need to get it to that finishing point, and that can be tough. And if you roll low or the thing has more HP than you expected, you're done doodly-squat to it. Hypnotic Pattern was I think a "young" dragon (which is how it survived 20d6 on a fall), and I'd definitely eat up legendary resistance before dropping that on anything bigger (cantrips like acid splash or other low-level spells can be nice to lower that - either they choose to save against the weak effect, and use up their LR, or they refuse and you still get a nice low-level effect on them!).
Again, narrative Dragonlance shenanigans have probably deeply affected my perspective on dragon fights in 5e - even the Adults we've faced have gone down pretty quick, but we've never fought one without allied dragons and/or dragonlances, so it hasn't really been a straight-up dragon-fight.
Yeah, me too! I mean, an opposed Athletics check isn't zero chance, but Dragons are not exactly...well...pushovers.
I agree that it seems a little weird, but, y'know, magic. Undead are practically immune to all the sleeps and charms my character usually uses, so I'm kind of glad they're vulnerable to SOMETHIING that I can use to screw with 'em.
Dropping a flyer with polymorph would probably work, it's just that my 4th level slots are currently very precious and I've got lower-level slots that can knock flyers out of the sky, so Polymorph is currently reserved for action-denial: I can Heighten and Bend Luck and have a reasonably solid chance at even denying a creature with Advantage a few actions.
...and given that the critter gets the mental ability scores of the thing they're turning into, I may have to remind my DM that flying pigs and bees probably have lost whatever knowledge of magical counter-tactics they had.
BUT, I have noticed that the average HP of a killer whale is more than the average damage from falling, so I've let my DM know that I know have capabilities "like feather fall, only less effective, and more hilarious."
Tasha's Hideous Laughter also knocks enemies prone which would drop them out of the sky. It only has a range of 30 feet though, so a bit tougher.
My players were able to finish off a dragon with a combination of that from a bard and bane from a paladin.
My group beat the young green dragon in Thundertree at 4th level. The dragon was closing in on the group and about to hit them with it's breath (which would have likely outright killed a couple of them and knocked out others) but it failed to notice the Arcane Trickster hiding off to the side. She hit it with THL, it failed it's save THREE times...by the time it recovered it was down to 20 hp and fled (and then they later cornered it and killed it).
What we've found is using tactics that lead to the party gaining surprise or other advantage are VERY powerful. Now that my players are 5th level the monsters will start using some of these same tactics...
My 4th level party of 6 characters defeated her, but it could have gone either way....
the brave gnome hit her with Tasha's and dropped her. Had she made that save events would have gone quite differently, I think.
...
And that is what I love about 5e. My players are feeling pretty invincible right now. They have no idea how lucky they've been. Their luck will run out.