Hwei vs Malzahar

Poke with Devastating Fire (QQ) in lane: the fireball explodes on the first enemy hit and adds damage based on their max health.

Hit the same champion with two damaging spells: Signature of the Visionary (passive) then leaves a signature beneath them that explodes shortly after.

Pick the subject that fits the moment: Devastating Fire (QQ) for damage, Pool of Reflection (WW) to protect your allies, Crushing Maw (EE) to pull a group together.

Block a chokepoint with Molten Fissure (QE): the line of eruptions leaves pools of lava that slow and damage enemies.

Cast Spiraling Despair (R) on a champion surrounded by allies: the vision expands around them, slowing harder and damaging nearby enemies before it explodes.

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.