Broken

Nasty Plot (Flutter Mane) @ Power Capsule / Life Orb 
Ability: Protosynthesis  
Tera Type: Ghost / Fairy / Fire 
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Moonblast  
- Calm Mind  
- Taunt / Mystical Fire

Hex (Flutter Mane) @ Power Capsule / Leftovers
Ability: Protosynthesis  
Tera Type: Ghost  
EVs: 196 HP / 96 SpA / 216 Spe  
Modest Nature  
IVs: 0 Atk  
- Hex  
- Moonblast  
- Taunt / Calm Mind
- Thunder Wave  

Swords Dance (Chien-Pao) @ Heavy-Duty Boots  
Ability: Sword of Ruin  
Tera Type: Dark  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Icicle Crash / Sacred Sword 
- Sucker Punch / Ice Shard 
- Throat Chop  
- Swords Dance  

Tera Lure (Chien-Pao) @ Life Orb  
Ability: Sword of Ruin  
Tera Type: Electric / Ground
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Icicle Crash  
- Sucker Punch  
- Tera Blast  
- Swords Dance  

Choice Band (Chien-Pao) @ Choice Band  
Ability: Sword of Ruin  
Tera Type: Dark  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Icicle Crash  
- Sacred Sword  
- Throat Chop  
- Ice Shard  

Defensive (Ting-Lu) @ Leftovers  
Ability: Vessel of Ruin  
Tera Type: Ground
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
- Earthquake  
- Taunt  
- Ruination / Throat Chop / Whirlwind
- Spikes  

Trapper (Ting-Lu) @ Leftovers  
Ability: Vessel of Ruin  
Tera Type: Ground / any
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
- Sand Tomb  
- Throat Chop  
- Ruination  
- Taunt  

Likely Broken  
Ability: No Ability  

Swords Dance (Iron Valiant) @ Power Capsule / Life Orb
Ability: Quark Drive  
Tera Type: Electric  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Close Combat  
- Spirit Break  
- Thunder Punch  
- Swords Dance  

Ghost Tera (Iron Valiant) @ Power Capsule / Life Orb
Ability: Quark Drive  
Tera Type: Ghost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Close Combat  
- Tera Blast  
- Shadow Sneak  
- Swords Dance  

Tera Lure (Iron Valiant) @ Power Capsule / Life Orb
Ability: Quark Drive  
Tera Type: Ground  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Close Combat  
- Spirit Break  
- Tera Blast  
- Swords Dance  

Dragon Dance (Roaring Moon) @ Power Capsule / Chople Berry
Ability: Protosynthesis  
Tera Type: Steel  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant / Jolly Nature  
- Throat Chop  
- Outrage / Earthquake / Scale Shot
- Iron Head  
- Dragon Dance  

Tera Lure (Roaring Moon) @ Power Capsule / Leftovers
Ability: Protosynthesis  
Tera Type: Flying  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant / Jolly Nature  
- Throat Chop  
- Earthquake / Outrage
- Tera Blast  
- Dragon Dance  

Choice Specs (Iron Bundle) @ Choice Specs  
Ability: Quark Drive  
Tera Type: Ice  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Hydro Pump  
- Freeze-Dry  
- Ice Beam  
- Flip Turn  

Utility Pivot (Iron Bundle) @ Heavy-Duty Boots / Power Capsule
Ability: Quark Drive  
Tera Type: Ice / Water 
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Hydro Pump  
- Freeze-Dry  
- Taunt / Encore
- Flip Turn  

Nasty Plot (Chi-Yu) @ Heavy-Duty Boots / Charcoal
Ability: Beads of Ruin  
Tera Type: Dark  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Flamethrower  
- Dark Pulse  
- Overheat  
- Nasty Plot  

Tera Lure (Chi-Yu) @ Heavy-Duty Boots / Life Orb
Ability: Beads of Ruin  
Tera Type: Fighting / Ground / Electric 
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Fire Blast
- Dark Pulse  
- Tera Blast
- Nasty Plot  

Wallbreaker (Kingambit) @ Life Orb
Ability: Supreme Overlord
Tera Type: Dark
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Kowtow Cleave
- Iron Head
- Sucker Punch
- Swords Dance

Shed Tail Abuser (Cyclizar) @ Choice Scarf  
Ability: Regenerator  
EVs: 252 HP / 4 Atk / 252 Spe  
Jolly Nature  
- Shed Tail  
- Knock Off  
- Dragon Tail  
- Ice Spinner

//EDITORS NOTE: The aspect likely to get banned here is Shed Tail, not Cyclizar

Solid OU, small risk of being broken  

Ghouldengo (Aegislash) @ Leftovers / Colbur Berry
Ability: Full Metal Body  
Tera Type: Ghost
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Shadow Ball  
- Make it Rain 
- Nasty Plot  
- Recover  

Choice Band (Meowscarada) @ Choice Band  
Ability: Protean  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Flower Trick
- Knock Off / Thunder Punch
- U-turn  
- Thunder Punch / Spikes / Sucker Punch / Play Rough

Offensive SD (Iron Hands) @ Power Capsule
Ability: Quark Drive  
Tera Type: Electric  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Close Combat  
- Wild Charge  
- Ice Punch  
- Swords Dance  

Defensive SD (Iron Hands) @ Power Capsule  
Ability: Quark Drive  
Tera Type: Electric  
EVs: 116 Atk / 252 Def / 140 SpD  
Impish Nature  
- Close Combat  
- Wild Charge  
- Ice Punch  
- Swords Dance  

Offensive Spin (Great Tusk) @ Power Capsule / Leftovers
Ability: Protosynthesis  
Tera Type: Ground
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Earthquake  
- Close Combat  
- Knock Off  
- Rapid Spin  

Great Tusk (Donphan) @ Power Capsule / Leftovers
Ability: Protosynthesis 
Tera Type: Ground 
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Earthquake  
- Taunt / Stealth Rock
- Knock Off  
- Rapid Spin  

OU Tossup  
Ability: No Ability  

Offensive Revival (Pawmot) @ Choice Band  
Ability: Volt Absorb  
Tera Type: Grass  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Double Shock
- Close Combat  
- Ice Punch  
- Revival Blessing

Offensive "Spin"blocker (Kilowattrel) @ Heavy-Duty Boots  
Ability: Wind Power  
Tera Type: Electric
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Thunderbolt  
- Hurricane  
- Volt Switch  
- Roost  

Defensive (Iron Treads) @ Leftovers / Power Capsule
Ability: Motor Drive  
Tera Type: Ground / any
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
- Earthquake  
- Knock Off  
- Rapid Spin  
- Stealth Rock  

Unaware Tank (Skeledirge) @ Heavy-Duty Boots  
Ability: Unaware  
Tera Type: Ghost / Normal
EVs: 252 HP / 252 Def / 4 SpA  
Bold Nature  
IVs: 0 Atk  
- Torch Song 
- Hex  
- Will-O-Wisp  
- Slack Off  

Niche in OU  
Ability: No Ability  

Swords Dance (Baxcalibur) @ Heavy-Duty Boots  
Ability: Thermal Exchange
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Glaive Rush  
- Icicle Crash / Ice Shard
- Earthquake  
- Swords Dance  

Choice Band (Baxcalibur) @ Choice Band  
Ability: Thermal Exchange
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Glaive Rush  
- Icicle Crash  
- Earthquake  
- Ice Shard  

Setup (Scream Tail) @ Power Capsule
Ability: Protosynthesis 
Tera Type: Psychic  
EVs: 160 HP / 252 SpA / 96 Spe  
Modest Nature  
IVs: 0 Atk  
- Stored Power  
- Dazzling Gleam  
- Calm Mind  
- Bulk Up  

//EDITORS NOTE: I don't expect defensive sets to be viable at all. The defensive typing we're working with here is mediocre and the bulk just isn't high enough

Hazard Lead (Glimmora) @ Focus Sash  
Ability: Toxic Debris 
EVs: 252 HP / 4 SpD / 252 Spe  
Jolly Nature  
- Mortal Spin 
- Stealth Rock  
- Memento / Explosion
- Toxic Spikes

Screens Lead (Glimmora) @ Light Clay  
Ability: Toxic Debris 
EVs: 252 HP / 4 SpD / 252 Spe  
Jolly Nature  
- Mortal Spin / Stealth Rock
- Explosion / Memento
- Reflect  
- Light Screen 

Hail Sweeper (Cetitan) @ Sitrus Berry  
Ability: Slush Rush  
Tera Type: Electric  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Ice Spinner  
- Earthquake  
- Tera Blast  
- Belly Drum  

BTEC Blaziken (Quaquaval) @ Life Orb  
Ability: Moxie
Tera Type: Flying  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Aqua Step 
- Close Combat  
- Brave Bird  
- Swords Dance  

Utility Cleaner (Houndstone) @ Choice Scarf  
Ability: Fluffy  
Tera Type: Ghost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Last Respects
- Play Rough  
- Trick  
- Will-O-Wisp  

Revenge Killer (Lokix) @ Choice Band  
Ability: Tinted Lens 
Tera Type: Bug / Dark 
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- First Impression  
- Throat Chop  
- U-turn  
- Sucker Punch