Thassa's Breath

The vial is filled with liquid that upon breaking
quickly turns into a block of ice. As an action,
make a ranged attack with a range of 30 feet,
treating it as an improvised weapon. On hit, the
target takes 4d6 Cold damage and is Restrained
by the ice if the creature is large or smaller. A
creature can end this condition using its action to
make a DC 16 Strength check to break the ice.
The ice has AC 12, 20 Hit Points, resistance to
Slashing, immunity to Poison/Psychic,
invulnerability