Riot Spikes

Cult of Rakdos Spell
Level 1
Casting Time: 1 Action (?)
Duration: 1 Minute (Concentration)
Range: Touch
Target willing creature's Physical Attacks deal an additional 1d12 necrotic damage and at the end of each of the target creature's turns, that creature takes 1d12 necrotic damage.
When cast at higher levels, raise each of the damage die by 1d12 for each level above 1st