Stellar Blade

After beating Gigas, the first Alpha Naytiba in Eidos 7, and returning to Xion, before you set out to the Wasteland Lily will turn the drone into a ranged attack weapon.

Once you have that, it's just a matter of killing 150 enemies with it. Because we didn't use the ranged weapon a lot in the game, we basically used it on the Naytiba Minions as they're easy to kill, just to get this trophy. Don't force it though, as the two Levoires in the game are ranged weapons only, and are full of enemies.

If you haven't got it by the time you leave the second one, though, just focus on the Minions when you see them around the open-world. 

We'd also recommend upgrading the drone for better ammo capacity, and if all else fails, you can attack enemies with the Blood Edge until they're low health, and finish them off with the drone’s ranged attacks. Don't be afraid to top up the ammo at the camp shops either, as we finished the game with around 190,000 gold. For a list of where all the Drone Upgrade Modules are, check out out supplementary guide to assist: Stellar Blade - All Drone Upgrade Module Locations.

Once you've killed 150, the ‘Cold-blooded Sniper's trophy will unlock.