Level
2nd
Casting Time
1 Action
Range/Area
60 ft.
Components
V, S, M *
Duration
Concentration
1 Minute
School
Enchantment
Attack/Save
WIS Save
Damage/Effect
Paralyzed
Choose a humanoid that you can see within range. The target must succeed on a Wisdom saving throw or be paralyzed for the duration. At the end of each of its turns, the target can make another Wisdom saving throw. On a success, the spell ends on the target.
At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one additional humanoid for each slot level above 2nd. The humanoids must be within 30 feet of each other when you target them.
* - (a small, straight piece of iron)
I had a 5th lvl warlock use HP to stun lock a melee focused Sorc-lock in a 1v1 and then repeated slam the sorc-lock with EB. Helped that the Sorc-lock player had taken wisdom as their dump stat.
How would this work against Half Elves, that gain advantage against being charmed?
This spell doesn't charm its target, so the Elf/Half-Elf feature you're talking about (Fey Ancestry) does not apply here.
Shout out to every DM coming to check the wording of this spell after the Fantasy High Junior Year finale