Aurora vs Renekton

Poke with Twofold Hex (Q), then recast it once the target has lost health: the hex passes back through them and deals more damage the more health they're missing.

Cast Across the Veil (W) to dodge a skillshot or break a chase: you leap and turn invisible briefly, and a takedown resets its cooldown.

Cast Between Worlds (R) in the middle of grouped enemies: those trying to enter or leave the area are slowed, which keeps them under your team's spells.

Inside Between Worlds (R), teleport from one edge to the other to dodge skillshots and reposition, as long as the area lasts.

Take a trade when his Fury is under 50: above that, Ruthless Predator (W) destroys your shields and stuns you twice as long.

Take a trade once he has used both Slice and Dice (E) dashes: it's his only way to reach you or get out, on a 16 to 10 second cooldown.

Once he hits level 6, back off when he casts Dominus (R): he gains max health, builds Fury every second, and damages enemies around him.

If you survive his first minutes, play for time: Renekton looks to get ahead in lane, before everyone has their items.