Rock Gnome

As a rock gnome, you have a natural inventiveness and hardiness beyond that of other gnomes.

Ability Score Increase

Your Constitution score increases by 1.

Artificer's Lore

Whenever you make an Intelligence (History) check related to magic items, alchemical objects, or technological devices, you can add twice your proficiency bonus, instead of any proficiency bonus you normally apply.

Tinker

You have proficiency with artisan's tools (tinker's tools). Using those tools, you can spend 1 hour and 10 gp worth of materials to construct a Tiny clockwork device (AC 5, 1 hp). The device ceases to function after 24 hours (unless you spend 1 hour repairing it to keep the device functioning), or when you use your action to dismantle it; at that time, you can reclaim the materials used to create it. You can have up to three such devices active at a time.

When you create a device, choose one of the following options:

Not in the 2024 rules

This does not appear in the 2024 System Reference Document. That is not the same as removed from the game — the SRD is a subset of what the books publish.

Everything that changed for species