Rules scope: This guide uses legacy Fallen Aasimar traits from Volo’s Guide to Monsters and the 2014 Sorcerer. The revised Aasimar and Sorcerer rules have different traits and progression.
Fallen Aasimar traits
The legacy Fallen Aasimar increases Charisma by 2 and Strength by 1. Healing Hands restores hit points equal to your character level when you touch a creature as an action, once per long rest. Necrotic Shroud is available at 3rd character level: as an action, creatures of your choice within 10 feet that can see you make a Charisma saving throw or become frightened until the end of your next turn. The transformation lasts 1 minute.
Once on each of your turns while Necrotic Shroud lasts, when you deal damage to a creature with an attack or spell, you can deal extra necrotic damage equal to your character level to one target. This is not extra damage on every spell, every damage instance, or every creature hit by an area spell. The frightened condition and the once-per-turn damage are separate parts of the feature.
Pick a Sorcerous Origin for its mechanics
Shadow Magic supports a dark theme with actual defensive and darkness features. Draconic Bloodline offers Draconic Resilience; at level 6, Elemental Affinity adds Charisma to one matching damage roll, while resistance to that damage type costs 1 Sorcery Point and lasts 1 hour. Divine Soul lets you choose Sorcerer spells from the Cleric list within the Sorcerer spells-known limit; it does not grant the full list. Its Favored by the Gods feature adds 2d4 to one failed save or missed attack roll, costs no Sorcery Points, and returns on a short or long rest.
Choose one Origin. A character does not gain several Origins’ features by selecting their themes or spells. If your table permits multiclassing or additional options, apply those rules separately.
Subtle Spell and spell visibility
Subtle Spell removes verbal and somatic components from a spell. It does not remove a material component or automatically make a casting impossible to notice or counter. If a spell requires a material component, you still need to provide it unless another rule removes that requirement. Treat the scene’s visibility and the exact components as relevant; do not promise that Subtle Spell guarantees an undetectable casting.
Build priorities and legal scores
Prioritize Charisma for spellcasting, then Constitution for hit points and concentration saves. Dexterity helps AC and initiative. One legal legacy point-buy base is Strength 8, Dexterity 14, Constitution 14, Intelligence 10, Wisdom 12, Charisma 14; apply the Fallen Aasimar increases afterward to Strength 9 and Charisma 16. Your campaign may use a different ability-score method, but racial increases are applied after choosing the base scores.
Necrotic Shroud rewards a turn when you can damage a meaningful target, but it does not require a melee build. Keep a safe position, use control or area spells for their normal effects, and add the feature’s bonus to just one creature on your turn. A Sorcerer’s low hit die makes unnecessary proximity risky.
Action economy reminder
Under the 2014 rules, casting a spell as a bonus action means the spell cast with your action that turn must be a one-action cantrip. This applies to Quickened Spell as well. Build a turn around one leveled spell plus an eligible cantrip when using Quickened Spell; you cannot follow a Quickened leveled spell with another leveled action spell that turn.
Using Necrotic Shroud well
Activate the transformation when nearby enemies are likely to matter and you can safely use an action. Creatures that fail the initial saving throw are frightened for the specified duration, which can interfere with their ability to approach you while they can see you. The feature’s extra damage is once on each of your turns against one creature you damage; it does not add your level to every beam, every target, or every spell during the minute. If an area spell hits several enemies, choose only one eligible target for the extra damage that turn.
Healing Hands is a separate once-per-long-rest action. It restores hit points equal to character level and does not cost a spell slot, but it requires touching the target. Use it when that action and range are practical. It does not replace healing spells, and casting a bonus-action healing spell has the normal 2014 action restriction.
Positioning and defenses
Frightening nearby enemies can help create space, but it is not a reason to build for melee by default. Sorcerers have a d6 Hit Die and usually lack armor proficiency. Keep a defensive spell or an escape option available, use allies and terrain for cover, and maintain a safe distance when the situation allows. Necrotic Shroud can be an opening move or a response to nearby threats, depending on initiative and the encounter.
For Draconic Bloodline, Draconic Resilience improves AC and hit points. Elemental Affinity at Sorcerer level 6 adds Charisma to one matching damage roll; its resistance benefit costs 1 Sorcery Point and lasts 1 hour. For Shadow Magic, check what the feature actually lets you see and which components a spell still needs. Magical darkness can hinder allies as well as enemies.
Spend Sorcery Points deliberately
Quickened Spell costs 2 Sorcery Points and changes an action spell to a bonus action. The 2014 rule then restricts the spell cast with your action to a one-action cantrip. Subtle Spell removes verbal and somatic components, but not material components. Empowered Healing, if you choose Divine Soul, costs 1 Sorcery Point and triggers on healing dice from a spell. Write down these costs and triggers so that features with different timing do not blur together.
Choose Charisma increases and feats as the character advances. Constitution helps concentration; a feat that supports concentration must say so explicitly. An ancestry feature that improves mental saving throws does not automatically improve the Constitution saves made to maintain concentration.