Shards

Melee Weapon Attack: +3 to hit, reach 0 ft., one creature in the swarm's space. Hit: 5 (2d4) slashing damage or 2 (1d4) slashing damage if the swarm has half of its hp or less.

Shrapnel

Ranged Weapon Attack: +3 to hit, range 30 ft., one target. Hit: 3 (1d6) piercing damage. A piece of the swarm breaks off, falling into the target's space.

Contain (Recharge 5-6)

The shard swarm envelopes one Medium or smaller creature in its space. The target must succeed on a DC 13 Dexterity saving throw or be restrained inside the swarm for 1 minute. The target has disadvantage on this saving throw if the shard swarm used Come Together to form in the target's space. While restrained, the target doesn't take damage from the swarm's Shards action, but it takes 5 (2d4) slashing damage if it takes an action that requires movement, such as attacking or casting a spell with somatic components. A creature within 5 feet of the swarm can take an action to pull a restrained creature out of the swarm. Doing so requires a successful DC 13 Strength check, and the creature making the attempt takes 5 (2d4) slashing damage.