Scavenge (Golgari Swarm)

"We grow strong by feasting on failure." - Izoni

You have become an expert at making use of things that the dead no longer need...mostly. 

You can spend an action scavenging from the dead, rolling 1d6 for each unconscious or dead body within 10 ft of you. You can choose to add the result as temporary hitpoints or as bonus damage on your next successful attack. 

You can scavenge from the dead a number of times equal to your proficiency bonus, with all expended uses being restored when you finish a long rest.