Slap battles killstreak be like:

Phase 1 (4 - 9 kills):
Song name: Undertale OST - 80 - Finale
This phase starts at 4 kills, as music starts playing, and the speed boost becomes noticeable. At 5 kills, you gain a red aura, and this is when you start to notice the speed and power boost more. This lasts until 10 kills, which is when the next phase begins.

Phase 2 (10 - 24 kills):
Song name: Scourge of the Universe
When you reach 10 kills, everyone's screen will flash red a few times, like a warning to everyone that you've reached 10 kills. Your speed and power increase further, and you can basically oneshot everyone unless they get lucky. You retain the same aura as Phase 1.

Phase 3 (25 - 49 kills):
Song name: Universal collapse
When you reach 25 kills, you are slowed to a crawl. The music starts, and everyone's screen is slowly tinted blue. As soon as the buildup in the song ends, the screen returns to normal, and the transformation is complete. You get extreme power and speed boosts, and now, it is almost always a oneshot kill. Your aura changes to blue, with lightning bolts and an X crisscross effect.

Phase 4 (50 - 74 kills):
Song name: Stained, brutal calamity
When you reach 50 kills, a black and purple colored explosion goes off around you. The song starts, and you are slowed. Everyone's screen slowly zooms out and turns red. Everyone's screen will stay this deep red color as long as you are in this phase alive. You slowly get faster, and the screen slowly starts to zoom back in. After the buildup of the song, your aura becomes bright red and fiery, signifying that the transformation is complete. You now have ludicrous amounts of both speed and power, and the sound it makes when you slap other people is the same sound as the God's Hand. You also leave behind you a fiery red trail.

Phase 5 (75 - 99 kills):
Song name: The filthy mind
Upon reaching 75 kills, the screen turns purple, then fades, while a powering down sound is played. Rainbow text appears at the top of the screen, saying, "Ability Unlocked!", then it slides to the top and disappears. Your speed and power are returned to default stats (35+, 15), and you unlock an E ability. Each kill gives you a little boost in speed and power.

Ability
Using the ability, you raise the glove into the air, and a purple energy orb grows. You then swing the glove forward and fire the orb directly the way you are facing. Honestly, the ability isn't that good, the purple orb deals only a slight amount of knockback. Getting a kill during the beginning of this phase is one of the hardest things about this glove, especially since the entire server is against you. Your aura is a dull, purple color, but when you reach 80 kills, it gets a bit more detailed, with a bit of a light purple, almost pink color being added. This is the only phase that does this kind of thing with the aura. You have to be extremely careful during this phase, as the other players will use your nerfed speed and power to their advantage. You need to get kills as quickly as possible so you can outrun the oneshot glove users.

Phase 6 (100 - 249 kills):
Song name: Unholy insurgency
When you reach 100 kills, an explosion sound effect plays, and everyone's screen is blinded by yellow. The music starts, and the yellow will eventually fade into a blur, and then back to normal. Your aura is a mix of yellow and black, and interestingly, the glove will glow a bright yellow, almost like the Golden glove. Your speed and power are restored, and so is the God’s Hand slap sound effect.

Ability
In addition, your E ability is upgraded. Now, it is a giant yellow orb that can kill everyone on a small island, which has extreme knockback, and a relatively short cooldown. It can also throw anyone off of the big island from wherever they are, unless they get knocked to the opposite edge from where they stand. With all of these pros, this might be a contender for the best ability in the game.

A skilled player with this phase is basically immortal for the time being, since they can just use their gigantic orb to knock camping God's Hand users and 1 shot gloves away. Only luck will decide when a 1 shot glove user spawns on you or if a certain glove user gets the chance of killing you.

Phase 7 (250+ kills; final phase)
Song name: GLITCHTALE OST - True Love metal remix
When you reach 250 kills, you are slowed, a new song will start, and a black, dripping effect emits from your character. Your pose also changes, with the character's arms being held behind the back, and you can see them breathing visibly. Once you reach this phase, you can no longer slap people, instead, you use your telekinesis ability to fight now. When using this ability, your character will extend their right arm, and a whoosh sound effect will play, pushing anyone far in front of you. You will not upgrade with every kill you get, as this is the final stage.

* Getting to 100 kills is extremely difficult. So it's not something you should see often.