Jarvan IV vs Fiddlesticks

Plant Demacian Standard (E), then cast Dragon Strike (Q) toward it: you fly to the flag and knock enemies in your path into the air.

Land an auto as soon as you reach your target: Martial Cadence (passive) adds damage based on their current health, then only triggers on them again after a few seconds.

Cast Cataclysm (R) on a carry who is away from their team: the arena is impassable, and you can recast to collapse it if it gets in your allies' way.

In teamfights, plant Demacian Standard (E) near the allies who are attacking: it gives them attack speed while they stay close to it.

Stay out of range of Terrify (Q), a targeted spell that reaches 575: if your range is longer, hit him from there without risking the fear.

If you have CC, interrupt Bountiful Harvest (W): he heals during the channel, and if he finishes it, the remaining cooldown drops by 60%.

Spread out from your allies when he arrives: Crowstorm (R) hits every enemy around him, and Bountiful Harvest (W) drains them all.

Ward the brushes and flanks around objectives: spotted in time, he loses the surprise of Crowstorm (R) and the passive fear of Terrify (Q).