SMITE

As Charon, hit 5 enemies from at least 500 units away with Summon Styx in one game.

Summon Styx is Charon's ultimate ability. When used, you charge up for a few seconds and then fire a medium-sized wave directly forwards. This wave continues for the entire length of the map and will pass through all walls.

For this achievement, you need to hit 5 enemy gods with this ability at over 500 units away (imagine this like the Janus "No Scope" achievement). You can hit the same god 5 times over the course of a game, or hit multiple gods over the course of a game. You don't have to hit 5 with a single use.

This will be best attempted in a laned mode. Assault would be your best bet as the lane is so narrow, with Slash as a second pick, then Joust, then Conquest. Arena is roughly 500 units long on its own, so it'd be incredibly difficult to get this in there. If you're lucky, getting Charon in Assault means you can get your ult at the beginning of the game, then you can immediately fire it towards the enemy spawn point, which should hit most of the gods at once, then you only have a single lane to fire it down in future.

In the other laned modes, your best bet would be to fire it off at objectives or the enemy spawn while at a large distance. As you only need to hit enemies, not kill them, your best bet would be to build maximum cooldown reduction, so you can use your ultimate as much as possible.