Qiyana vs Bel'Veth

Pick your Terrashape (W) element for the job: river for an Ice root, terrain for Rock's bonus damage on low-health targets, brush for Wild's invisibility.

Cast Terrashape (W) right after Elemental Wrath (Q): the dash resets its cooldown, so you can recast it in the same combo.

Cast Supreme Display of Talent (R) toward a wall near the enemies: the explosion runs along the whole edge of the obstacle, and any river or brush it crosses explodes too.

Roam with Wild, the brush element: Elemental Wrath (Q) then leaves a trail that makes you invisible and speeds you up.

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.