Improved Healer and Healer's Kit

You are now an accomplished physician, allowing you to mend more serious wounds quite quickly and get your allies back in the fight. You gain the following benefits:

• +1 to your Wisdom or Constitution scores
• Proficiency in Medicine
• You can make your own Healer's Kit, improved with the addition of healing herbs and more attentive construction. Making such a kit assumes the availability of cloth for bandages, wool for gauze pads, and honey and any local healing herbs for unguent, which will cost 5gp. Making a full kit takes1 hour of work, and 7 more hours to allow things to set and steep.
• When you use a healer's kit to stabilize a dying creature, that creature also regains 1 hit point
• As an action, you can spend one use of a healer's kit to tend to a creature and restore  
  • 2d6 + 8 hit points to it,
  • plus additional hit points equal to the creature's maximum number of Hit Dice,
  • plus your Proficiency and Constitution modifiers
• The creature can't regain hit points from this feat again until it finishes a short or long rest