Necrotic Overlay, Variant (5e Spell)
From D&D Wiki
|Casting time:||1 bonus action|
|Components:||V, M (a drop of blood)|
|Duration:||Up to 1 minute|
You overlay your magic or your weapon with necrotic power. If you overlay your spell with necrotic power you will change the damage type of the spell to necrotic damage. If you overlay a weapon you may replace your melee attack with a melee spell attack. You may add your spell-casting ability modifier to the damage with that weapon. The damage type is converted to necrotic.
For example if you are a sorcerer and you have 16 charisma and 14 dexterity and you overlay a melee weapon with necrotic overlay, let's say a quarterstaff. The stats of the quarterstaff will be +5 to hit (Charisma + proficiency bonus) Damage: 1d6 (1d8 Versatile) +2 Bludgeoning damage +3 Necrotic damage ( charisma)
The weapon or the spell changes when you overlay it, giving it a smoky and greenish aura.
The damage of the melee attack or spell increases by +1 when you reach 5th level (+1), 11th level (+2), and 17th level (+3). Any additional damage dice can be split as you desire among slashing or necrotic damage.