Multiattack

The shadow giant makes three attacks with its tenebrous talons.

Tenebrous Talons

Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 14 (2d6 + 7) slashing damage plus 18 (4d8) necrotic damage.

Cold Shadow (Recharge 5-6)

The shadow giant directs its shadow to stretch out in a 60-foot cone. Each creature in that area must make a DC 18 Constitution saving throw. On a failure, a creature takes 52 (15d6) cold damage and has disadvantage on attack rolls and saving throws until the end of its next turn. On a success, a creature takes half the damage and doesn't have disadvantage.