Drake, Riptide 2014
CR 11 dragon
Large dragon, lawful evil
Can breathe air and water.
Can’t use its blindsight while deafened or out of water.
Advantage: Dex (Stealth) underwater.
Bonus Actions
While underwater changes water flow within 60' of it. Chooses one of below which lasts until start of its next turn.A 20' cube of rushing water forms on a point drake can see in the water. The cube's space is difficult terrain and a creature that starts its turn swimming in the area must make DC 17 Str save or be pushed out of the cube directly away from drake.The current shoots in a 60' long 10 ft. wide line from drake in a direction it chooses. Each creature in area: pushed up to 15 ft. away from drake in a direction following the line (DC 17 Str negates).The drake takes the Dash action.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details