Viktor vs Malzahar

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.

Get out of the Call of the Void (Q) zone quickly: its two portals fire after a short delay, and their projectiles silence you.

If you have CC, hit him first with a cheap attack, then wait a moment: Void Shift (passive) still ignores CC right after the first damage.

Stay away from minions hit by Malefic Visions (E): if they die, the visions jump to the nearest enemy, and his Voidlings follow them.

Take your trades before he hits level 6: after that, Nether Grasp (R) can lock you down from range while his team hits you.

When he casts Nether Grasp (R) on an ally, focus him: he channels in place, and any CC interrupts him and frees your ally.