Necrotic Overlay (5e Spell)
From D&D Wiki
|Casting time:||1 bonus action|
|Components:||V, M (a drop of blood)|
|Duration:||Concentration, up to 1 round|
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 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 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) Bludgeoning damage +3 Necrotic damage ( charisma)
The weapon or the spell changes when you overlay it, becoming smoky and greenish. The weapon will look like a sickle, for example, a quarterstaff will look like a scythe for the duration of the spell.