Ezreal vs Xayah

Land Mystic Shot (Q) as often as you can: each hit lowers all your cooldowns and adds a Rising Spell Force (passive) stack.

Detonate Essence Flux (W) with a spell rather than an auto: the orb deals its damage either way, but a spell refunds its mana cost plus a bonus.

Save Arcane Shift (E) to escape unless the kill is certain: it's your only way to reposition, on a 26 to 14 second cooldown.

Cast Trueshot Barrage (R) across the map to finish a fleeing target: it hits everything in its line, but deals less to minions and non-epic monsters.

Don't stand between Xayah and her feathers on the ground: Bladecaller (E) pulls them back to her, and 3 feathers passing through you root you.

If you can engage, go in when she has no feathers on the ground: without them, Bladecaller (E) can't root you.

During Featherstorm (R), hold your spells: she's untargetable for 1.5 seconds, then lands, leaving a line of feathers.