Small elemental, any
Armor Class: 12 + PB
Hit Points: 5 + five times your class level (the carbuncle has a number of Hit Dice [d8s] equal to your arcanist level)
Speed:
, can hover
Damage Immunities: Fire
Languages: understands the languages of its summoner but cannot speak
Enkindle
Inferno (Requires Arcanist Level 14). Ifrit-Egi releases an explosive pillar of fire around itself in a 30ft. radius, severely burning all creatures in range. All affected creatures must make a Dexterity saving throw against your spell save DC. Creatures that fail the Dexterity check take 45 (7d12) fire damage, or half as much on a successful save.
Actions
Burning Strike. Melee Weapon Attack: your spell attack modifier to hit, Reach 5ft., one target. Hit: 12 (1d6 + 3 + PB) slashing damage plus 1d4 fire damage.
Flame Charge (Recharge 6). The Ifrit-Egi releases a burst of flames in a 10ft. radius circle around itself. Each creature in the affected area must succeed on a Dexterity saving throw against your spell save DC. Each creature takes 8 (1d12 + PB) fire damage, or half as much damage on a success.
Ifrit-Egis are bathed fire, their bodies sporting large horns and claws. Some depictions swing between demonic, lizard like or beastial in nature.