D&D 5E - 5e rot grubs?

Since I am curious and really like your comments. I've bought your Depth of Felk Mor.

For the rot grub, as the old timer that I am. I love them.
I would've add this for the medicine check
A successful medicine check inflicts 1d6 dmg to the patient. After all, trying to burrow a knife or pliers in somebody does do damage.
An unsuccessful check will inflict 2d4 in addition to the damage the grub's doing.

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