Your Constitution score increases by 2.

Gargoyles are constructs created with stone and magic. Being a being of the arcane and created by a maker, your size is entirely dependent on the choices of the maker. You are either small or medium, and may or may not have large wings and/or bat-like facial features.

Being built from stone gives you a hardy skin, but your maker made you with a purpose of sentinel, Your choice of score from either Strength or Dexterity increases by 1.

Your base walking speed is dependent on the cycle of the sun. While in daylight, your skin hardens and your walking speed is 30 feet. After sunset and in dark or dim light your movement speed increases by 5 feet.

Gargoyles don’t mature and are built out of the arcane. Being as such they do not die of old age.

Being a powerful creature of the night, you have excellent vision in dark and dim conditions. You can see in dim light within 90 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You can speak, read, and write Common and one other language of your maker.

When you take a long rest, you spend at least 6 hours in a motionless state instead of sleeping. In this state, you remain conscious.
You can also enter Stone Form, in which you allow your skin to harden to rock and remain conscious. To exit this form takes time and you must spend an action, “waking up”, unless you’re struck by a melee attack. While in this form you are considered Petrified, except you are not incapacitated. Stone Form alters you to look exactly as a statue, gaining advantage to stealth checks in this form.

As a creature of arcane stone, you have hardened casing that grants you some small bit of protection.While you aren’t wearing armor, your base Armor Class is 13 + your Dexterity modifier.

Gargoyles have wings that can be utilized while not in heavy armor. While falling, you can use your reaction to open your wings and glide. Glide allows you, when you fall and are not incapacitated, to subtract up to 50ft from the fall when calculating fall damage and you can move 2ft horizontally for every 1ft you descend. This movement may not exceed your current move speed, and if you are still airborne after your move, the DM will determine a skill check and DC to make, to remain in control of your movement on your next turn.