Amethyst Shadow Dragon Brand

Produced by close proximity to the death of a shadow dragon.

Tattoo Attunement. To attune to this item, you must be within close proximity of a shadow dragon's death.

If your attunement to the tattoo ends, the tattoo vanishes.

Once per long rest you can use an action to transform into a Shadow Dragon.

Shadow Dragon Form
Large Dragon, Chaotic Evil

Armor Class 19 (natural armor)
Hit Points 250 (15d10 + 45)
Speed 40 ft., fly 80 ft., swim 40 ft.

STR
19 (+4)
DEX
16 (+3)
CON
17 (+3)
INT
12 (+1)
WIS
11 (+0)
CHA
15 (+2)

Saving Throws DEX +6, CON +6, WIS +3, CHA +5
Skills Perception +3, Stealth +10
Damage Resistances Necrotic
Damage Immunities Acid
Senses Blindsight 30 ft., Darkvision 120 ft., Passive Perception 16
Languages Common, Draconic
Challenge 8 (3,900 XP)
Proficiency Bonus +3

Multiattack. The dragon makes three attacks: one with its bite or tail, and two with its claws.

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 4 (1d8) necrotic damage.

Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Tail. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage.

Amphibious. The dragon can breathe air and water.

Sunlight Sensitivity. While in sunlight, the dragon has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Living Shadow. While in dim light or darkness, the dragon has resistance to damage that isn’t force, psychic, or radiant.

Damage Resistances. The dragon has resistance to necrotic damage. 

Magic Tattoo Coverage

Notes: Sense: Darkvision, must be partly responsible for the death of a shadow dragon.