Datamined changes from current PBE release. Be aware that these changes are tentative and they might be changed or even reverted prior to the live patch.
Datamining only captures numerical changes. It doesn't capture changes to mechanics and bugfixes that may also significantly affect balance.
Due to the nature of how the datamining works it may also includes some of the changes that are already added to the live version in the most recent patch.
Updated: Jul 9 9AM

Ezreal
Active: Fire a blast at the current target that deals 184/276/412 (
) physical damage. Every 8 takedowns, gain a drone that deals 8/12/18 (
) physical damage to the current target on cast. Active: Fire a blast at the current target that deals 184/276/412 (
) physical damage. Every 7 takedowns, gain a drone that deals 8/12/18 (
) physical damage to the current target on cast. 
Talon

Zoe
Fire a paddle star at the current target, dealing 68/102/180 (
) magic damage to the first target hit and 34/51/77 (
) to others it passes through. When the missile reaches its destination, redirect it to a distant enemy, increasing its speed and repeating the damage. This redirect can occur 54 times.
Secondary Damage: 51 (
) [34/51/77]
Fire a paddle star at the current target, dealing 68/102/180 (
) magic damage to the first target hit and 36/54/88 (
) to others it passes through. When the missile reaches its destination, redirect it to a distant enemy, increasing its speed and repeating the damage. This redirect can occur 54 times.
Secondary Damage: 54 (
) [36/54/88]

Diana
Shield: 325 (
) [275/325/475]
Orb Damage: 90 (
) [60/90/145]
Shield: 325 (
) [275/325/515]
Orb Damage: 90 (
) [60/90/160]

Aurelion Sol
Channel a deathbeam in a line towards the current target for 43 seconds. It deals 320/480/2000 (
) magic damage per second, reduced by 80% per enemy it passes through. Deathbeam ignores 30% of the enemy's Magic Resist.
Damage: 480 (
) [320/480/2000]
Channel a deathbeam in a line towards the current target for 43 seconds. It deals 335/505/2000 (
) magic damage per second, reduced by 80% per enemy it passes through. Deathbeam ignores 30% of the enemy's Magic Resist.
Damage: 505 (
) [335/505/2000]

LeBlanc
Passive: Attacks deal 66/99/250 (
) magic damage instead.Active: Summon 5 clones that attack alongside for 5 attacks, dealing 25/25/150% damage. For their final attack, clones fire a bolt that deals 85/130/750 (
) magic damage.
Bolt Damage: 130 (
) [85/130/750]
Passive: Attacks deal 66/99/250 (
) magic damage instead.Active: Summon 5 clones that attack alongside for 5 attacks, dealing 25/25/150% damage. For their final attack, clones fire a bolt that deals 95/145/750 (
) magic damage.
Bolt Damage: 145 (
) [95/145/750]

Master Yi
Projection Damage: 105 = 75
+ 30 
[50/75/600]
Projection Damage: 115 = 85
+ 30 
[55/85/600]

Nami

Vex
Passive: Every time Vex attacks, Shadow strikes a nearby enemy, dealing 27/40/250 (
) magic damage. Whenever an enemy is struck 5 times by Shadow, Shadow strikes them again.Active: Shadow launches 3 empowered strikes, dealing 140/210/1000 (
) magic damage instead.
Empowered Strike Damage: 210 (
) [140/210/1000]
Passive: Every time Vex attacks, Shadow strikes a nearby enemy, dealing 27/40/250 (
) magic damage. Whenever an enemy is struck 5 times by Shadow, Shadow strikes them again.Active: Shadow launches 3 empowered strikes, dealing 130/195/1000 (
) magic damage instead.
Empowered Strike Damage: 195 (
) [130/195/1000]

Zed
Create a clone behind the target with 33/45/45% reduced max Health and 30 increased Mana cost. The clone inherits its creator's items, stats, and current Health, and can cast Quantum Clone.
Create a clone behind the target with 33/40/40% reduced max Health and 30 increased Mana cost. The clone inherits its creator's items, stats, and current Health, and can cast Quantum Clone.

Anima
After losing a player combat, gain 20 Tech, plus additional Tech equal to 5 times the length of your loss streak. Additionally, gain 2 Tech per Anima takedown.Each time Animas get 100 Tech, they prototype new Anima Weapons. You can take them, or save your Tech to get more powerful weapons next time.(3) Start Researching!
(6) After each player combat, gain loot!
<ShowIf.TFT17_AnimaSquad_IsDoubleUp>Gain 85% Tech from losing if your partner wins a combat in Double Up.</ShowIf.TFT17_AnimaSquad_IsDoubleUp> After losing a player combat, gain 20 Tech, plus additional Tech equal to 5 times the length of your loss streak. Additionally, gain 2 Tech per Anima takedown.Each time Animas get 100 Tech, they prototype new Anima Weapons. You can take them, or save your Tech to get more powerful weapons next time.(3) Start Researching!
(5) After each player combat, gain loot!
<ShowIf.TFT17_AnimaSquad_IsDoubleUp>Gain 85% Tech from losing if your partner wins a combat in Double Up.</ShowIf.TFT17_AnimaSquad_IsDoubleUp> 
Mecha
Innate: Mecha units can transform into their Ultimate form, upgrading their ability and gaining 40% Health. Transformed Mechas take up two team slots and count twice for the Mecha trait.(3) Energy Cells: Mechas gain 25% 
. (4) Overclocked Cells: Increased to 45% 
. (6) Precision Engineering: +1 max team size
Use the Mecha-Former item to toggle the forms of your Mecha units Innate: Mecha units can transform into their Ultimate form, upgrading their ability and gaining 40% Health. Transformed Mechas take up two team slots and count twice for the Mecha trait.(3) Energy Cells: Mechas gain 25% 
. (4) Overclocked Cells: Increased to 40% 
. (6) Precision Engineering: +1 max team size
Use the Mecha-Former item to toggle the forms of your Mecha units 
Replicator
Replicator abilities occur a second time at reduced effectiveness.(2) 22% strength
(4) 45% strength
Replicator abilities occur a second time at reduced effectiveness.(2) 22% strength
(4) 50% strength

Rogue

Timebreaker
(2) Allies gain 15% Attack Speed.
(3) AND When you lose, gain free rerolls. When you win, store XP in a Temporal Core (scales with stage).
(4) AND Timebreakers gain an additional 50% Attack Speed
(2) Allies gain 12% Attack Speed.
(3) AND When you lose, gain free rerolls. When you win, store XP in a Temporal Core (scales with stage).
(4) AND Timebreakers gain an additional 50% Attack Speed

Birthday Reunion
Gain 3 gold. At Level 5, gain a random 2-star 2-cost champion. At Level 7, gain a Thief's Gloves. At Level 9, gain a random 2-star 5-cost champion.Inkborn Fables Tactician's Crown, 2024 Gain 1 gold. At Level 5, gain a random 2-star 2-cost champion. At Level 7, gain a Thief's Gloves. At Level 9, gain a random 2-star 5-cost champion.Inkborn Fables Tactician's Crown, 2024 
Forward Thinking
Lose all your gold. After 6 player combats, gain back the original amount and another 70 gold.
Lose all your gold. After 5 player combats, gain back the original amount and another 62 gold.

Restart Mission
Remove all champions on your board and bench. Gain 2 random 2-star 3-costs, 3 2-star 2-costs, and 1 2-star 1-cost champion.
Remove all champions on your board and bench. Gain 2 random 2-star 3-costs, 2 2-star 2-costs, and 1 2-star 1-cost champion.

Two Tanky
When you field exactly 2 copies of a champion, they both gain 400 Health. When one copy dies, the other gains a 35% max Health Shield for 12 seconds. When you 3-star, gain a 2-star copy.
When you field exactly 2 copies of a champion, they both gain 375 Health. When one copy dies, the other gains a 35% max Health Shield for 12 seconds. When you 3-star, gain a 2-star copy.