GMforPowergamers
Legend
my answer would be take the drow stats as a start (so you have spell like abilities) and have an alternate not drow... then make eladrin and astral elves a new race/species each. have the fluff background connect them but not the rules... the Shadar-Kai deserve this break off tooAstral: Teleport prof/day, bonus light-themed cantrip, floating skill proficiency
Eladrin: teleport prof/day with four different riders at 3rd level (damage, move ally, charm, or frighten)
Sea: water breathing, swim speed, talk with fish
Shadar-kai: necrotic resistance, teleport prof/day with rider at 3rd level (half-damage for 1 round)