• Shadow Blend: The Young Deep Shadow Dragon can meld into shadows, becoming almost invisible in dim light or darkness. It has advantage on Dexterity (Stealth) checks made to hide in such conditions.
• Necrotic Breath: Instead of a traditional breath weapon, this dragon exhales a cone of necrotic energy. This breath attack deals necrotic damage, sapping the life force of those caught within it.
• Umbral Step: As a bonus action, the dragon can teleport up to 60 feet to an unoccupied space it can see that is in dim light or darkness.

Multiattack. The dragon makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 9 (1d10 + 4) piercing damage plus 3 (1d6) poison damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) slashing damage.

Shadow Wave Breath (Recharge 5–6). The dragon exhales a wave of darkness in a 30-foot cone. Each creature in that area must make a DC 15 Constitution saving throw. On a failed save, the creature takes 22 (4d10) necrotic damage, and it is blinded by trailing wisps of darkness for 1 minute. On a successful save, the creature takes half as much damage with no additional effects. A blinded creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.