Allies of rot and decay

After dying, several creatures that feed on decay started eating your corpse. When you got ressurected these creatures were also affected by the magicks and now function as a part of your new body. You can call forth a swarm of insects or rot grubs from your own body. Using a bonus action you can command the swarm and using an action you can call it back into your body. There can only be one swarm at any given time and when the swarm is killed, the swarm will reform over 1d8 days.