Remathilis
Legend
But there's a big difference if I want to make a cloud giant zombie or purple worm skeleton, just to give two examples. I, for one, would really like to have a template for skeletons and zombies - the 5e templates so far have been short and sweet, and with a proper template it would be a breeze to create a skeleton or zombie out of any creature I wanted. Or, at the very least, give us more examples to use, not just for themselves, but as a base we can extrapolate other similar creature skeletons/zombies from...
Do worms even have skeletons?
That said, take a giant/skeleton, add +2 dex, -4 Int/Cha, give him Vunerability to bludgeon, immune to poison/poisoned, exhaustion, darkvision, and can't speak as traits. Then, remove attacks that no longer makes sense (such as acid spittle or innate spellcasting) and recalculate via the DMG.
Dead simple.