Crioderian Ranged Marine

Multiattack. The Crioderian Ranged Marine makes two attacks with its Cantrip Rifle or a dagger shove attack.

Cantrip Rifle (Firebolt). Ranged Weapon Attack: +4 to hit, reach 120 ft., 1 target. Hit: 8 (1d10 + 2) fire damage. 

Cantrip Rifle (Ray of Frost). Ranged Weapon Attack: +4 to hit, reach 60 ft., 1 target. Hit: 7 (1d8 + 2) cold damage. The target loses 10 ft of movement if this attack hits. This effect cannot stack, even from different sources.

Cantrip Rifle (Sapping Sting). Ranged Weapon Attack: +4 to hit, reach 30 ft., 1 target. Hit: 5 (1d4 + 2) necrotic damage. The target must succeed on a CON 15 saving throw or be knocked prone if this attack hits.

Dagger Shove. Melee Weapon Attack: +4 to hit, reach 5 ft., 1 target. Hit: 6 (1d6 + 2) piercing damage. If this attack hits make a DC 14 STR saving throw or be pushed back 15ft by a large gust of wind from the shield.

Take Cover. When targeted by a ranged attack that deals damage, the Crioderian Ranged Marine can use its reaction to try and protect itself from the attack by taking cover even further behind it's shield. When it does so it gains +3 to it's AC but loses half of it's movement next turn and has disadvantage to DEX saving throws until the start of its next turn.