Talon vs Bel'Veth

Apply three Blade's End (passive) stacks by hitting with your spells, then strike with an auto: the target starts bleeding and takes heavy damage over time.

Cast Noxian Diplomacy (Q) in melee range when you can: instead of the leap, it lands a critical strike. If it kills, it heals you and comes back faster.

During Shadow Assault (R), break invisibility with an auto or Noxian Diplomacy (Q): the blades then converge on your target instead of coming back to you.

Push your wave, then roam by vaulting walls with Assassin's Path (E): the spell comes back fast, but you can only cross the same wall again after a long delay.

Back off when she takes her true form with Endless Banquet (R): she gains health, range and attack speed, and with enough stacks, the form lasts until she dies.

Dodge Above and Below (W): if it hits you, you take a knock-up and her Void Surge (Q) in your direction is refreshed instantly.

If you're the lowest-health enemy near her, get out of Royal Maelstrom (E) range: every slash targets you, and she gains lifesteal and damage reduction.

Deny her large monsters and kills: Death in Lavender (passive) gives her permanent attack speed for each one.