This Metallic Mask resonates with an unnatural frequency echoing memories of another world.

Arcane Focus:
This mask is a spellcasting focus.

Power Up:
While attuned, this mask gives you 2 additional uses of your dragon breath or 1 use of the Brass Dragon Sleep Breath per long rest.

Brass Dragon Sleep Breath:
You can exhale a sleep gas in a 15ft cone. Each creature in that area must succeed on a Constitution Saving Throw, DC 14, or fall unconscience for 1 minute. The effect ends for a creature if it takes damage or someone uses an action to wake them.