Viktor vs Cassiopeia

Poke with Hextech Ray (E), fired in the direction you choose: it hits every enemy in its line, and its upgrade adds an aftershock in its wake.

After Siphon Power (Q), land an auto within 4 seconds: it deals bonus magic damage, and the spell's shield covers you during the trade.

Place Gravity Field (W) in your target's path, then fire Hextech Ray (E): the field slows them, and if they stay in it for 1.25 seconds, they're stunned.

Glorious Evolution (passive) upgrades a spell every 100 Hex Fragments: Hextech Ray (E) to poke and clear, Siphon Power (Q) to survive, Gravity Field (W) to slow.

Place Arcane Storm (R) on grouped enemies: it follows the champions it just damaged on its own, and you can recast it to move it.

Dodge Noxious Blast (Q): without poison on you, Twin Fang (E) deals much less damage and doesn't heal her.

Walk around the Miasma (W) clouds: inside, you're slowed and can't use dashes or jumps.

Turn your back to her when she casts Petrifying Gaze (R): facing her, you're stunned; facing away, you're only slowed.