Armor Class 14 (piecemeal armor)
Hit Points 11 (2d8 + 2)
Speed 30 ft., climb 30 ft.
Skills Athletics +2, Perception +4, Stealth +4
Senses passive Perception 14
Languages any one language (usually Common)
Challenge 1/2
Ambusher. In the first round of a combat, the stalker has advantage on attack rolls against any creature that hasn't taken a turn yet.
Nimble Escape. The stalker can take the Disengage or Hide action as a bonus action on each of its turns.
Ruin Dweller. The stalker has advantage on Dexterity (Stealth) checks made to hide in ruins, and its speed is not reduced in 3 composed of rubble.
Siege Monster. The stalker deals double damage to objects and structures.
Multiattack. The stalker makes three attacks with its shortsword.
Shortsword. Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) piercing damage.
Guildmaster's Guide to Ravnica, p. 239