Stats

Armor, magic resist, mana and attack speed are the same at every star level.

Vi

1 star: Charge the farthest enemy, knocking aside and dealing 125 magic damage to all enemies along the way. When the target is reached, deal 250 magic damage and Stun them for 2 seconds.
2 star: Charge the farthest enemy, knocking aside and dealing 185 magic damage to all enemies along the way. When the target is reached, deal 375 magic damage and Stun them for 2.5 seconds.
3 star: Charge the farthest enemy, knocking aside and dealing 325 magic damage to all enemies along the way. When the target is reached, deal 625 magic damage and Stun them for 3 seconds.

4 patches changed Vi, read out of Riot’s game files.

Patch 10.16
- Primary damage350 / 550 / 1100350 / 550 / 13501★ / 2★ / 3★
- Secondary damage150 / 200 / 500150 / 200 / 6001★ / 2★ / 3★
Patch 10.14Jul 2020
- Primary damage400 / 600 / 1200350 / 550 / 11001★ / 2★ / 3★
Patch 10.12Jun 2020
- Armor3545
- Magic resist2040
Patch 10.7Apr 2020
- Assault and Battery rewritten
  Before
  Vi charges at the farthest enemy, knocking aside all enemies in her path and dealing them 200 magic damage. When she reaches her target, she knocks them up for 2.5 seconds and 600 magic damage.
  After
  Vi charges at the farthest enemy, knocking aside all enemies in her path and dealing them 200 magic damage. When she reaches her target, she knocks them up for 2.5 seconds and deals 600 magic damage.