my god

Quote from rimworkd >>

my god

 I agree

Quote from Grymwyrd >>

lots of threads on reddit doing theorycrafting.  This is one of my favorites.

Let's Break The Sound Barrier! (For one turn every hour) : DnD (reddit.com)

"I have been trying to find someone else that has made this build by looking up the fastest you are able to go in D&D, but it seems like everyone who has tried is missing one thing or another. So, today I am going to teach you all how to break the sound barrier in D&D 5e and create a sonic boom with your body!

EDIT It has been brought to my attention that a fighter's action surge does not grant an additional bonus action. Because of this, you will need 2 Transmuter's stones that give +10 speed on your person at the very least to break the sound barrier. However, there is still hope, because Jeremy Crawford himself has stated that a transmuters stone does not lose its power when the maker dies. This means that even if there are no transmutation wizards in your party, all you have to do is find and kill two transmutation wizards in the world after stealing their +10 speed stones.

 

So, How Fast Can We Go On Our Own?

Firstly, I will state that the absolute maximum speed possible in D&D requires your DM to allow you to become a Bladesinger Wizard as a Tabaxi. The easiest solution I can come up with that satisfies this requirement on a roleplaying perspective is to be a Tabaxi raised by elves rather than your own kind, but if your DM won't allow you to become a Bladesinger you MUST acquire at least one Artifact with the Major Speed Bonus(Mentioned later in the guide). For now, I'll assume you will be able to play as a Tabaxi Bladesinger, and I'll get on with the guide without further delay.

For starters, let's lay out the total bonuses we can gain to our base movement speed.

30 Base - Tabaxi starting speed.

20 speed - Level 10 Monk

10 speed - Level 5 Barbarian

10 speed - Mobile Feat

10 speed - Using Bladesong(lasts 1 minute)

10 speed - Longstrider spell cast on ourselves(lasts 1 hour)

15 speed - Totem Warrior Barbarion, Elk Totem(While Raging)

20 speed - 2x Artifact Magic Items with the Major Beneficial Property granting +10 Speed to its user.(We can't have more than this because we'll need to attune to Boots of Speed as well)

This gives us a total base speed of 125 feet per movement taken, but we can do better than even this.

By equipping Boots of Speed to double our base movement and combining that with the Tabaxi's ability to double our base speed for a turn in exchange for not moving at all the next turn, we can get a grand total of 500 FEET PER MOVEMENT MADE( 125 x 2 x 2 )

Now, keep in mind that this 500 ft. is only the amount we move when simply taking our move action for the turn. In addition to this, we can both use our action to take a dash action, and(because of our monkish powers) we can spend a ki point to dash with our bonus action too.

Altogether that gives us 1500 FEET OF MOVEMENT IN ONE TURN, but even then we aren't quite finished. We still have a few unused levels. Enough to grab 2 levels of fighter for a single turn per short rest in which we can use our Action Surge to gain an additional Action and Bonus Action.

So, have we finally found the furthest distance our character can travel without any outside help? Yes! And that total is 2500 FEET OF MOVEMENT IN A SINGLE TURN.

"But OP!" I hear you say, "A turn is 6 seconds long, so even at 2500 feet a turn, we're only moving around 416 feet per second. Nowhere close to the speed of sound!!"

And how right you are, so now we must ask the question:

 

What Can My Party Do To Help?

Well, to be more precise, what can a single Transmutation Wizard do to aide our endeavors? Well, it's quite simple, really.

First of all, at level 5, our wondrous wizardly ally can caste Haste on us, not only doubling our movement speed, but also giving us yet another action with which we can dash.

Secondly, once he's level 6, our bestest friend in the entire world will be able to craft a Transmuter's Stone, empowered with the ability to grant 10 speed to whomever carries it(that'll be us).

So, what does that give us? Well, let's figure it out:

125 speed from the aforementioned sources above.

10 speed from our handy dandy Transmuter's stone.

3 sources of speed doubling from Tabaxi Agility, Boots of Speed, and Haste

And a whopping 6 actions with which to move.

Our Grand Total?: 6,480 feet of movement in a single turn.

"BUT WAIT!" some of you may scream out after doing the math, "Even that leaves us 45 feet per second short of breaking the sound barrier to create the sonicboom we so desperately crave, OP!!!"

And you'd be right. Even with the help of everything we've mentioned above, our character cannot hope to break the speed of sound, but there is one final question to ask ourselves, dear readers:

 

What Can We Do With The Help Of A God?

Yes, that's right. The gods of Faerun are here to help, and they have just the thing our character needs to break their way past the sound barrier.

THE BOON OF SPEED - If we can manage to win the favor of a god, they can bestow our already mighty body with supernatural speed. To be precise, they can give us a whopping 30 additional base movement speed. What's more, this gets calculated in before any of our doubling, and we technically only needed 10 more movement speed to reach the speed of sound. So, if your DM doesn't include the Artifact level Magic Items blessed with speed we mentioned above, you'll still be able to pull this off. But for the sake of argument, we'll keep them in for this final calculation.

 

So, with everything above in mind, what exactly is the fastest you can run in a single turn?

7,920 FEET. That's right, you heard me. Seven-Thousand, Nine-hundred, and Twenty Feet of movement in a single, solitary turn. What's that mean for our hopes and dreams? It boils down to 1,320 ft. per second. Finally! We've broken the 1,125 fps we need to break past the speed of sound! Our character can create a sonic boom in the world of Dungeons & Dragons!

 

Now, let's put this into perspective for you. This means that:

- We can travel ANYWHERE within a 1.5 MILE radius of our starting position in a single turn.

- We run so fast that it would take not one, not two, not even THREE! But a total of 8 Sorcerers with Quickened Spell casting Dimension Door Twice a turn all in the same turn to keep up with us! And that's only IF the DM allows Sorcerers to cast a spell on their action and bonus action like I do, which is usually not allowed given the base rules in the PHB.

-We create a ******* SONIC BOOM people!

But that isn't even the best part. There is one final little fact about this that I want to put into perspective for everybody.

For every 10 feet you fall in D&D, you take 1d6 points of damage. If you factor in the acceleration of gravity to figure out how fast you are falling when you take max damage from this(20d6) at terminal velocity, you're ONLY traveling at 176 feet per second. We'll round that up to 200 just to make our calculations for this next part more coherent. If you don't round this up, you'll actually do even more damage than what we'll get.

So, divide that 200 feet per second by the 20 hit dice we're working with, and it boils down to D&D dealing 1d6 damage to a creature for every 10 fps they are traveling upon impact. Do you see we're we're going with this?

 

In case you forgot, we are moving at a grand total of 1,320 feet per second at our maximum speed, so all you need to do is get that BEAUTIFUL Wizard Friend of yours to concentrate an Invulnerability spell on you instead of Haste to complete our master plan. Now, we'll lose some speed from this unless we have another spellcaster around to keep haste on us, but even with that in mind we're still going to be moving 550 feet per second during our turn.

This means we'll be doing 55d6 POINTS OF DAMAGE(Or 132d6 if we have another caster to give us Haste) when we body slam ourselves into our opponent. Thanks to invulnerability we won't take that damage ourselves, and with a maximum damage output of 330 HP, we have the chance to deal nearly HALF of a Tarrasque's HP on our turn. What's more, if we DO have that secondary mage in our party, we can deal up to a grand total of 792 HP, ALLOWING US TO POTENTIALLY ONE SHOT ANYTHING our DM can throw at us with a body slam.

 

I hope you all enjoyed this guide as much as I enjoyed thinking it up and writing it out. For those that want it all summed up, the full build required to make this dream a reality is 2 Levels of Fighter, 5 Levels of Barbarian, 10 Levels of Monk, and 2 Levels of Bladeslinger Wizard. That still leaves us with 1 last level that you can really spend as you please, but personally I'd put this into a 3rd level of Bladeslinger for access to 2nd level spells. This will allow you to pick up Spider Climb for pesky creatures that want to hide on the ceiling as well as See Invisibility to let you body slam opponents that think you can't see them. Thank you all for the time, and I can't wait to see your reactions"

that's not the fastest you can go

Inhales

tabaxi, barbarian 5 (totem warrior), fighter 2, monk 6, wizard 2(bladesinging), sorcerer(wild surge) 5, 200ft flying speed (ancient sea dragon), +15 totem spirit elk, +10 fast movement, +15 unarmored movement, +10 bladesong, +10 mobile feat, +30 boon of speed, +10 Heart of Air, +10 longstrider, +10 lv 3 artificer (alchemist) friend, +10 lv 6 wizard (transmuter) friend, +10 1 artifact with major beneficial property of speed, +10 lv 2 wizard(graviturgy) friend, +10 lv 6 bard (creation) friend, +10 glory paladin, times 2 feline agility, times 2 potion of speed (haste), times 2 boots of speed, times 2 chronolometer, move, action move, haste action move, action surge move, bonus action move, chronolometer move, chronolometer move, wild magic surge move*15, reaction Sword of the Paruns dash, (200+15+10+15+10+15+10+10+30+10+10+10+10+10+10+10+10)*2*2*2*2*(1+1+1+1+1+1+1+15+1)

wait i was wrong 

tabaxi,
barbarian 5 (totem warrior),
fighter 2,
monk 6,
wizard 2(bladesinging),
sorcerer(wild surge) 5,
200ft flying speed (ancient sea dragon),
+15 totem spirit elk,
+10 fast movement,
+15 unarmored movement,
+10 bladesong,
+10 mobile feat,
+30 boon of speed,

+10 Heart of Air cast by friend,
+10 longstrider cast by friend,
+10 lv 3 artificer (alchemist) friend,
+10 lv 6 wizard (transmuter) friend,
+10 1 artifact with major beneficial property of speed,
+10 lv 2 wizard(graviturgy) friend,
+10 lv 6 bard (creation) friend,
+10 glory paladin,
times 2 feline agility,
times 2 potion of speed (haste),
times 2 boots of speed,
times 2 chronolometer,

move,
action move,
haste action move,
action surge move,
bonus action move,
chronolometer move,
chronolometer move,
20 lv wizard with reverse gravity + wild magic surge*55
reaction Sword of the Paruns dash,
(200+15+10+15+10+15+10+10+30+10+10+10+10+10+10+10+10)*2*2*2*2*(1+1+1+1+1+1+1+55+1) =398160ft = Mach 59.43909

every 75ft you move in 6 seconds is an extra d10 damage from a cannonball 398160/75=5308.8d10 he shoots 50 of them from a bag of holding 50*5308.8d10=265440d10 average damage is 1459920 max damage is 5308800