Lagma balls removes the normal cloaking function and replace it with the lag switch.

Lagma balls - Spy's watch.
Fixes the interp at 0.05 at whim, allows the user to see the actual hitbox as an astral projection. Don't ask me anything. The point is it being able to be manipulated on the fly. But the enemy can see the spy like a scout after drinking Bonk.

Red mist sui-*de : Demoman's sticky
Stickies don't stick to the walls, 2 closest stickies are automatically connected together with a tripwire laser of the team color. Crossing the line will detonate the powerful stickies but, players can jump over them. As they don't stick to the wall, they fall directly under where the impact happened.

Originally posted by I miss you like 90% probability:

Heavy's melee - Cult of Marena
Blast opponent to above. Uppercut I meant shoryuken. It's a combo weapon, as long as you don't miss you can continuously launch the target airborne.

Heavy's primary - Drowning Marzanna
Put airborne opponent's velocity to 0, as long as you don't miss you can effectively keep the opponent airborne. Drastically reduce the velocity of the opponent in all directions if it should require more skills to pull off the combo. It can be combined with the previous "VT-shell" approximate explosion rocket launcher. What if projectiles all exploded within the range, detecting the airborne target.

Add mini-crits against airborne targets.

His Eternal Remedy (H. E. R) - Engi's PDA
Removes Sentry HP by 50. Reduce incoming damage by a flat value of 15. Shotgun damages are reduced for the consecutive amount of the pellets. Assuming each shotgun pellets are never exceeding the damage over 15, the damage dealt from shotguns are completely negligible. Sentry HP could be removed 60, or even 70 to compensate for the balancing purposes.

Scout's balls - secondary : throwable (Mute grenade)
It's a baseball shaped concussion grenade. When it impacts on the ground or even a target, it creates a unique high pitch noise which is not disturbing enough for the players. The grenade affects surprisingly wide area of enemies. Anyone inside the range will get deaf for 5 seconds.

Simpler Chain Reactor (revision of my old idea)
Sticky launcher without m2 functionality, hitting the old sticky with new one detonates the 2 stickies. Any stickies caught in the explosion will detonate too. The initial idea had a gimmick about chain explosion getting buffed each time, a sticky detonated by another sticky increasing the damage. But the idea is too situational. I guess keeping the ability to put sticky traps while limiting the use in close range works. If the chain increased the explosion radius, it gets harder to control each explosion's radius. Simply removing the explosion radius buff for connected stickies would be sufficient. But again, it gets harder to hit. Maybe we could make it "Distance-based" again. If the sticky chain-detonated is far away from where the first explosion originates, it gets damage buff based on the distance. It's more predictable. Giving 0.1 second delay for chain reaction to happen definitely helps with the registration. The sticky supposed to be on the last end getting prematually detonated by the early chain bomb will reduce the expected damage. So, that's what so unpredictable about the damage. I was thinking about this problem from when I posted the original concept. Increasing the base explosion radius and removing the "explosion radius increases per chain" system might be the best solution. Also, "hitting the old sticky with a new one" is radius-based mechanics. Doesn't have to be exact on the collision, as you can see, it's motif is a nuke. Thus, the stickie models resemble atoms.

About HitchHiker's sniper rifle. The charge only affects the scoped-shot damage. Firing without scoping automatically removes all the charge. It might be better just forcing the damage to be 50 non-scoped, and leaving the charge until shot is fired in a scoped state. The point is to keep the sniper moving after all. Also it rewards players for being more dynamic. But, "blank" fire could be exploited. I mean, shooting at nothing in the backline and moving to the place you are supposed to fight is silly right? But again, wasting the high damage shot will definitely decrease the efficiency compared to the stock. So it's not a problem. Making the "last coordinate" registered only when the sniper hit something punishes too hard. It should be okay to fire at nothing in the backline and getting the boost, because the playstyle is less efficient.

Wildbird Seeker - Auto aim pistol with a probability to miss based on the distance.
Locks on targets like wrangler but the pistol has a coded chance to intentionally miss. I wonder if anyone posted the idea of auto aim pistol. I once watched a mini-sentry themed pistol on youtube a while ago, but the stat was about having infinite ammo. I genuine believe this idea is posted like thousand times, but in case it's not getting the attention it deserves. Daily reminder that it should exist. Of course it's exclusive to engi. The whole point is giving a rest to the player's wrist, not many people want to sweat over playing a game. So it's good to have something force you to be on par with average players, without taking much efforts.

I think this might be harder to use but, I present you Evora.
This sniper rifle's magnification is according to the charge. Hitting alt-fire twice will change the scope to a fixed one. Kind of like AWP from CS GO, but the first one's magnification multiplier constantly increases until hitting the maximum charge. The charge is instead called "Focus". Mouse sensitivity is untouched, I think the varying magnification will disturb the aim but with a practice it should be fine. It could be done with how long you are holding the M2-button initially, instead of syncing with the charge meter. So that a player has a precise control of how much magnification the player wants.

Enora III - Hitch Hiker's Sniper rifle
While scoped your sniperrifle won't charge, but when you are moving non-scoped. Walking around charges the sniperrifle. It forces the sniper to move around. Good for more dynamically advancing snipers. It might be better based on the distance from the last firing position. Further the location, more damage. Having 2 positions in occasion, switching the place every shot to charge the sniper rifle. The damage increase is based on the distance and it changes in liner fashion. Firing the gun first in the spawn and taking the tele should remove the damage increase. The coordinate of last shot fired is overwritten every shot.

Metal rags - Engi's building
Stop cart from advancing when placed on the rail