Ice Mephit

When the mephit dies, it explodes in a burst of jagged ice. Each creature within 5 feet of it must make a DC 10 Dexterity saving throw, taking 4 (1d8) slashing damage on a failed save, or half as much damage on a successful one.

While the mephit remains motionless, it is indistinguishable from an ordinary shard of ice.

The mephit can innately cast the following spells, requiring no material components:
1/day: fog cloud

plus 2 (1d4) cold damage.

The mephit exhales a 15-foot cone of cold air. Each creature in that area must succeed on a DC 10 Dexterity saving throw, taking 5 (2d4) cold damage on a failed save, or half as much damage on a successful one.