Went with #D which is grammatically more correct but parses funnily in my head
(agree with CR 1) ...so beginning with what was written in Tizun Thane and working up..
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Green gremlins are implike fey creatures that inhabit dark places such as ancient forests, caves or dungeons. They have a horrible visage with vampire-like fangs and drooling lips. Leathery-skinned, they have a wiry build with long limbs and large hands and feet, and are equally at home climbing across walls and ceilings as they are on the ground.
They collect and hoard any trinkets they can find, often in secret hidey-holes only accessible via climbing. Green gremlins are capricious and unpredictable; many are malevolent and ill-willed, though occasionally good-natured ones may be encountered. They are often solitary, though may work together in small groups for a time or associate with other creatures such as darklings or goblins.
Looks good...although should be "gremlin" and not "goblin" all the way through.
Not thrilled about "supernatural" (I mean...everything is supernatural in dnd...)...maybe "psychic" or "intense"?
Fleshed out descriptions are good to give a critter some colour and flavour - useful for DMs I reckon. Maybe a note their hoard could include fey trinkets if located on the feywild?
Also, noting they could be a familiar for a warlock with Pact of the Chain and Fey Patron maybe?
Ok spider climb and uncanny are fine - published here

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.