Water Whip: Knock Prone

Water Whip: Knock Prone is a class action that allows a Way of the Four Elements monk to deal damage and knock a target prone.

Description

Use the water whip to knock the target

At level 9 with

Improved Elemental Casting, the damage increases to 4d10

UID

Target_WaterWhip_Prone

Spell flags

DisableBlood, IsHarmful

Prone

Duration: Until Long rest

The affected creature cannot move or take  Actions,  Bonus Actions, or  Reactions, and has Disadvantage on Strength and Dexterity saving throws.
Attacks against a Prone creature have Advantage if made within 3 m / 10 ft of the creature.
A Prone creature must spend half its Movement Speed to stand up.
- A character with the Athlete feat spends only 1.5 m / 5 ft of Movement Speed to stand up.

This spell is a variation of:
Water Whip

This spell and Trip Attack (Ranged) are the only two sources of an indefinite prone effect. While an enemy can spend movement speed to end the Prone condition and get up, if it is prevented from moving (e.g. with Ensnared, Enwebbed, or Frightened), it will remain prone indefinitely.
Along with Fangs of the Fire Snake (which uses an unarmed attack roll), this is the only other Way of Four Elements abilities that scales with Strength or Dexterity rather than Wisdom.
Since this uses weapon action DC, Heightened Manoeuvre from the Gauntlets of the Warmaster will apply. Conversely, bonuses to spell save DC such as Lay Bare Their Weakness from the Hat of Uninhibited Kushigo will not apply.

The combat log will incorrectly show the DC calculation as the base DC + Wisdom modifier + proficiency bonus, but the resulting DC will still be based on the higher of the character's Dexterity or Strength modifier.