Curse of Three Trigrams

You speak aloud a spiteful incantation, attempting to curse a creature you can see within range. The creature must make a Charisma saving throw or be cursed for the duration.

If a creature fails its saving throw, three trigrams appear on its body. When you cast the spell, and as a bonus action on your subsequent turns, you can release one of the remaining trigrams and cause one of the following effects:

• The creature must make an intelligence saving throw, taking 4d6 psychic damage on a failed save, or half as much damage on a successful save. 
• The creatures movement speed becomes 0 until the start of your next turn.
• The creature has disadvantage on attack rolls, ability checks, or saving throws until the start of your next turn.

Once you release a trigram, it disappears and cannot be released again. Once all the trigrams have been released, the spell ends.

At higher levels: when you cast this spell using a spell slot of 5th level or higher, one extra trigram appears on the creature for every 2 slot levels above 3rd.