Bel'Veth vs Cho'Gath

Chain Void Surge (Q) in different directions: each direction has its own cooldown, which drops with your attack speed.

Cast Above and Below (W) when the target can't dodge it: hitting a champion knocks them into the air and refreshes Void Surge (Q) in that direction.

After a kill or an epic monster, eat the Void Coral with Endless Banquet (R): your true form gives you health, range and attack speed.

Take large monsters, large minions and kills: Death in Lavender (passive) gives you permanent attack speed for each one.

Keep moving against him: Rupture (Q) strikes an area on the ground, and an enemy standing still takes a knock-up, damage and a slow.

Punish him when he goes for last hits: Carnivore (passive) restores health and mana for each unit he kills, and he lasts a long time in lane if you let him farm.

If you have range, keep your distance: his kit has no dash, only the slows from Rupture (Q) and Vorpal Spikes (E).

Don't stay in melee range at low health when Feast (R) is up: its true damage ignores your resistances, even if you're a tank.