Chromasiphon [H]

Elemental Chromatism. The Chromasiphon consumes colour and converts it into elemental energy, as shown in the Elemental Chromatism table below. When a creature fails their saving throw against the Chromasiphon's Chromatic Consumption feature the Chromasiphon gains immunity to the damage type associated with the colour it drained and all damage it deals becomes that damage type. The immunity and damage type lasts until the end of the Chromasiphon's next turn or is replaced when the feature is used again.

Elemental Chromatism Table

Legendary Resistance (1/Day). If the Chromasiphon fails a saving throw, it can choose to succeed instead.

Innate Spellcasting. The Chromasiphon's spellcasting ability is Charisma (spell save DC 18, +10 to hit with spell attacks). The Chromasiphon can innately cast the following spells, requiring no material components:

At Will: Chromatic Orb, Colour Spray.

2/day Each: Major Image, Elemental Bane.

1/day Each: Prismatic Spray.

Magic Weapons. The Chromasiphon's weapon attacks are magical.

Multiattack. The Chromasiphon uses Chromatic Consumption and then makes three Pseudopod attacks.

Chromatic Consumption. The Chromasiphon targets a creature it can see within 60 feet. That creature must succeed on a DC 18 Charisma saving throw or take 4d8 Psychic damage. Additionally, roll a d8 and consult the Elemental Chromatism table, the target creature has the rolled colour entirely drained from their body, clothes and equipment including from secondary/tertiary colours that contain it (i.e. orange clothing being drained of the colour red would become yellow). In addition, the creature becomes unable to deal any damage of the associated type.

A creature can have multiple colours drained from them, and if a creature is completely drained of colour it dies instantly. When a drained creature completes a long rest they can roll a d20 and on a roll of 10 or higher one of the drained colours is restored. A creature can also regain a lost colour if they are targetted by a Greater Restoration or a similar spell of equal or higher power.

Pseudopod. Melee Weapon Attack: +8 to hit, reach 15 ft., 1 target. Hit: 15 (2d10 + 3) bludegoning damage, or 27 (4d10 + 3) damage if the Chromasiphon is under the effect of Elemental Chromatism.