All Mythics bosses explained like you are 5

DISCLAIMERWith World Quests, BOEs, heroic dungeon gear, it's pretty easy to find players that have a decent 335+ ilvl gear but still dont know anything about a lot of Mythic bosses. This is not about M+, i wrote this for people that want to do M0s in public groups, so they have a general base of information about what a boss vaguely does, while keeping the "guide" as simple as possible. There is a lot of more detailed information on the internet about it if you wanna get into the details. If you see something blatantly wrong please specify it I will edit the post (still learning). Atal'Dazar Priestess Alun'zaPrevent Spirits to absorb blood pools, when she casts Transfusion run into a blood pool so you get tainted, purge / steal Gilded Claws.Vol'KaalKill all 3 totems around the same time otherwise they'll go back to full hp. Don't stand on green poo. Interrupt his poison cast (called Noxious Stench, thanks u/peenda).RezanDon't walk into the piles of bones, hide behind a wall when he screams, if he runs after you to Devour you, run away, preferably dont make him run into a pile of bone.YazmaInterrupt her if you can, dont run into spiders, when you have big purple arrow above your head, run away from boss and (slow/stun)kill the Shadow image that spawns at your location. Freehold Skycap'n KraggSpread from your party members, kick his healing spell. When he dismounts from his bird, the bird will come back from the edge of the arena and charge through. Try to avoid this bird.Council o' CaptainsWhen friendly has big barrel on his head, kill barrel, don't stand in AOE.Ring of BootyCatch pig, avoid turtle shurikens, when the sharknado guy throws sharks, you can kite them into the blood puddles, slowing them significantly (thanks u/boysapunk). Don't go melee range of boss when he does big tornado around himHarlan SweeteDon't stand in big orange bombardment, dodge stuff thrown at you. Kill the bomb add or it will chase someone and blow up (thanks u/Talehon). King's Rest The Golden SerpentWhen you have orange DOT on yourself go away from boss it will make a pool appear beneath you at the end of the DOT, try to stack those pools at the same place, important cause thats where the adds will come from, don't let adds reach boss, use your slows and stuns, dont stay melee range when boss is doing tornado around himMchbimba the EmbalmerSpread out so eveyrone is in decently close to a crypt, dont stand in big fire, when he entomb someone watch the crypts, if the crypt is shaking and making noise click on it.The Council of TribesAvoid big flying axes, when he starts charging someone, go stand inbetween boss and guy whos being charged, kill totems (explosive totem first), interrupt Poison Nova.Dazar, the First KingAvoid tornado, spread out so you don't get damaged when he jumps on someone. When stuff starts falling on the ground go counter clock wise fast so you go past it, dont try to outrun it, go the other way. Shrine of the Storm Aqu'SirrDont stand near edges, you don't wanna get knocked back and die, avoid his charge, avoid blue aoe on the ground. When he splits into 3 water elementals, try to focus fire them one by one, dont spread DPS.Tidesage CouncilInterrupt the woman as much as you can,. If you're tank and the male boss becomes very big either pop defensive CD or kite him so he doesnt hit you. They will make circles appear on the ground : one give lots of haste, other one gives lots of damage reduction when you stand in those. Go stand in those accordingly.Lord StormsongAre you being Mind controlled by the boss ? If yes, go walk in dark orbs that are chasing your friends. If not, don't go walk in dark orbs that are chasing you.Vol'zith the WhispererIf ground is all black go away from it. Use the bonus damage / heal from the thing he casts on you to get through the phase where you're separated from team, then dispel it. Separated phase : Tank kite slow mob / heal dps slow mob / DPS interrupt tentacle mobs. Don't let adds reach boss but don't kill all adds at the same time because when they die they do damage to everyone. Siege of Boralus Sergeant BainbridgeDon't walk in bombs on the ground. If the boss is chasing after you, make him run through bombs on ground.Dread Captain LockwoodOn the ground there will be big circles appearing. Don't stay on those circles. Pick up the thing left on the floor and use it to force boss back. Keep her slow / root at all times or she will House of Pain - Jump Around.Hadal DarkfathomWhen big waves appear, hide behind the big statue in the middle of the room. Don't walk on the ice.Viq'GothIf you're tank always go melee range of Demolishing tentacle (kill this one first as specified by u/sindeloke). Then help the dwarf get out of his personal anime episode by killing tentacles grabbing him. If you have dot on you go away from friends so you can get dispelled without feeding your friends to sharks. Temple of Sethraliss Adderis and AspixHit the one that doesnt have Lightning Shield (it will change so be careful), if you have electricity debuff on you go away from friends, spread out when he is doing ninja electricity charge.MerekthaDon't stand in green poo, turn your character 180 degrees when he's about to blind you, kill serpents that are imprisoning your friends (or stun the serpent sack, it will remove it, thanks for the heads up u/ElementaryMyDearWut), when he is burrowed avoid him.GalvazztPillars will appear. Go stand between boss and pillar so he doesnt gain energy. This will stack a debuff on you. If you have more than 10 stacks stop standing between him and pillars and/or use defensive CD to remove stacks (iceblock, maybe cloak for rogue not sure about that).Avatar of SethralissDont click on green orb before everything is dead. Kill heart guardian, interrupt Plague doctor, don't stand in blue light on the ground. If Healer, don't touch frogs they will lower your heals (thanks u/Redruddc) The MOTHERLODE!!!!!!!!!!!!!!!! Coin-Operated Crowd PummelerWhen he drops grenades on the floor, go throw those back at him. You need to be facing him while in front of the grenade. When he turns facing you and starts canalizing a spell, move so you're on his side or back.AzerokkUse totems to CC 2 elementals before the fight. If you have big red eyes on you run away from elementals. When they become very shiny they take 150% more damage but they also hit harder, so kill them with range. Don't stand near the boss.Rixxa FluxflameShe will throw azerite on the ground. You want to be standing in between the boss and the azerite. She will then push you away, avoid it by going sideways. (thanks to u/Antisceptic)Mogul RazdunkIf big north korean missile is running to you, go away from your friends. If you have a big red arrow on your head, go near a big rocket. The Underrot Elder LeaxaI'm sure there is something this boss does apart from dying fast, but I havent found it yet.Cragmaw the InfestedGo away from the direction he's facing when he's charging. Go step on red things on ground so it doesnt spawn little adds that will stack a nasty dot on you.Sporecaller ZanchaHe will spawn green shrooms around him. When you have a big arrow above your head, go stand near those shrooms (but not IN it). If you're the tank, make him face a big chunk of shrooms and bring him quite close to it so when he cast shockwave he will clean those shrooms. If you clean enough shrooms you wont die when he makes them explode.Unbound AbominationHe is immune to damage but that doesnt mean you dont have to do damage to him. Just dps him. Don't stand on grey poo on the ground. When you or someone in your party has a big yellow circle around him, go stand in it. Use the big yellow circle if its around you to cleanse grey poo on the ground (dont stand inside it though, just next to it). When little blood adds spawn, the big titan helping you will stun one. Go kill the other one. Tol'Dagor The Sand QueenWhen you have big arrow on your head, go away from friends. Dont walk into stuff she spawns on the ground. Kill adds quickly.Jes HowlisWhen he starts casting Flashing Daggers go behind a wall. When he runs away follow him and finish him. Use your stuns / slows on adds.Kingh Captain ValyriIf you have red fire dot on you, dont go near barrels, you will explode them. If you don't have it on you, try to move some barrels so your party has some space to stand when she will make them explode.Overseer KorgusWhen you move, your bar fills up. When your bar is filled up, you are stunned for 10 seconds. Avoid black aoe on the ground. Cannons on the side will charge a shot, don't go in front of it. Move away from allies when you have the orange circle on you so circle doesnt reach them. Waycrest Manor Heartsbane TriadOne of the 3 bosses will be bigger than the others. Do damage to this one. Then it will change. So change target, you need to hit the one that is bigger than the others always. Keep moving when you have shadow dot on you to avoid stacking it.Soulbound GoliathWhen he imprisons one of your friends kill the thing. Don't stand on the fire. If you're a tank, when boss reaches high stacks you might wanna pop defensive CDs or kite him. If you kite him, make him walk into the fire on the ground.Raal the GluttonousStand on his side. Slow the servants trying to reach the boss.Lord and Lady WaycrestWhen she drops the bass, move away from things on ground. When you have dot on you, move away from friends because you will leave a pool of poison on the ground. Don't stand on that.Gorak TulKill adds before they cast Death Lens. Pick up molotovs to burn their bodies so Gorak can't rez them all at once. (thanks u/TheMostStupidest). This is not supposed to be a super accurate elite guide, but if you follow those simple guidelines you should be fine in any Mythic0 dungeon