Gaki

Impish Tricksters

Gaki are goblins with infernal heritage. Like their cousins the tieflings, their ancestry leaves them marked with a range of skin and eye colors ranging from orange-red, to green-blue or a deep purple-maroon, even white or deep black. Their eyes run a similar gamut in pigmentation, and they may sport unusually long, curved nails, horns, cloven feet or even a whip-like tail.
Gaki are typically cunning, manipulative and most are natural leaders among tribes of other goblins. It is not unusual for such a goblin to arrive as a stranger to a tribe, ingratiate themselves to its chieftain, and build a base of support before deposing old leadership in favor of their own.

Gaki

Ability Score Increase Your Charisma score increases by 2, and your Intelligence score increases by 1.

Size Small

Speed 25 ft

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Age.  Gaki reach adulthood at 8 years, and live up to 60 years.
Alignment.  Gaki are typically lawful evil, either leading a group of goblinkind, or serving their a more powerful master (such as an oni) with the hopes of one day rising to power themselves.
Size.  Gaki are between 3 and 4 feet tall and weigh between 40 and 80 pounds. 
Darkvision.  You can see in dim light within 60 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.
Fury of the Small.  When you damage a creature with an attack or a spell and the creature's size is larger than yours, you can cause the attack or spell to deal extra damage to the creature. The extra damage equals your level. Once you use this trait, you can't use it again until you finish a short or long rest.
Hellish Resistance.  You have resistance to fire damage.
Impish Legacy.  You know the fire bolt cantrip. Once you reach 3rd level, you can cast the hellish rebuke spell as a 2nd-level spell; you must finish a long rest in order to cast the spell again using this trait. Once you reach 5th level, you can also cast the invisibility spell; you must finish a long rest in order to cast the spell again using this trait. Charisma is your spellcasting ability for these spells.

Languages. You can speak, read and write Common, Goblin and Internal.