Faultless Tracker. The stalker is given a quarry by its summoner. The stalker knows the direction and distance to its quarry as long as the two of them are on the same plane of existence. The stalker also knows the location of its summoner.
Actions
Multiattack. The stalker makes two slam attacks.
Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage.
RollQuest summary Resistant to bludgeoning, piercing, and slashing from nonmagical attacks. Condition immunities: exhaustion, grappled, paralyzed, petrified, poisoned, prone, restrained, unconscious. Senses: darkvision 60 ft., passive Perception 18. Languages: Auran, understands Common but doesn't speak it. Skills: Perception +8, Stealth +10. Speed: 50 ft., fly 50 ft. (hover).
RollQuest ships the D&D 2014 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.