Investiture: Tin Allomancy

 A creature invested with the power of Tin Allomancy is known as a "Tineye" and is granted the following abilities:

The Tineye may ingest and "burn" Tin; for an hour, the Tineye gains +3 to their passive perception and advantage on all perception checks. Enemies within 100 feet have disadvantage on stealth checks.

While burning tin the Tineye has superior vision in dark and dim conditions. The Tineye can see in dim light within 60 feet as if it were bright light, and in darkness as if it were dim light. The Tineye can also see through the mists as though they were not there. 

The Tineye may burn metal a number of times between long rests equal to 2 + their proficiency bonus.