Angel, Pelagic Deva 2014
CR 11 celestial
Medium celestial, neutral good
Can breathe air and water.
Its weapon attacks are magical. When it hits with any weapon deals extra 4d8 radiant (included below).
Doesn't require food drink or sleep
Its armor is made of living coral. If armor is damaged such as from a black pudding’s Pseudopod armor fully repairs itself within 1 min provided it wasn’t destroyed.
Advantage: spell/magic effect saves.
Bonus Actions
Removes oxygen from nearby water for 1 min. Each creature that requires oxygen to live (including air-breathing creatures under effects of water breathing) and starts its turn within 20' of deva: DC 17 Con save or begin suffocating. Deva never suffers effects of this; can choose any creatures in area to ignore it.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details