Fey Ancestry. The elf has advantage on saving throws it makes to avoid or end the charmed condition on itself, and magic can't put it to sleep.
Unusual Nature. The elf doesn't require sleep.
Multiattack. The elf makes two Longsword or Radiant Ray attacks.
Longsword. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:11 (2d8 + 2) slashing damage, or 13 (2d10 + 2) slashing damage when used with two hands, plus 10 (3d6) radiant damage.
Radiant Ray. Ranged Spell Attack: +6 to hit, range 120 ft., one target. Hit:22 (4d10) radiant damage.
The safety of important individuals and locations is entrusted to astral elf honor guards, highly trained warriors who are more than capable of holding their own in combat.