Decompose

You reach out and touch the corpse of a creature that is not a construct, elemental, or ooze.

When cast as a cantrip, the body degrades rapidly over the course of a few seconds, leaving only a small amount of rich mulch.  If done in an area of vegetation, the remains of the corpse are barely noticeable, requiring a DC 20 Wisdom (Perception) ability check to detect.  Occasionally, a dark or odd colored flower or two may grow from the corpse.

When cast as a 2nd level spell, the corpse begins to decompose over the course of the next minute, sprouting fungus and moss as it begins to degrade into compost and mulch. Materials must be crafted within 24 hours, and crafted items must be used within 24 hours, or they lose their potency. Roll a d12 and consult the following table to determine what flora grows from the corpse, and therefore what poultice or tea can be crafted.

1-3
Gutweed
Black Sage
Once collected and crushed into a tea blend, the ingredients will lose their potency after 24 hours.
-Bloodcleanse Tea: This herbal tea helps cleanse the body of toxins.  With a DC 5 Wisdom (Medicine) ability check and ten minutes time, you can brew these plants into a foul smelling poultice or hot tea with bloodcleansing effects.  When applied or consumed as an action, it removes the poisoned condition from a creature.

4-6
Moonwort
Ash Needle
Once collected and ground, the poultice will lose its effectiveness after 24 hours.
-Woundbind Poultice: This spongy mass of absorbent moss can stop bleeding, cleanse wounds, and dull pain. On a successful DC 10 Medicine (Wisdom) check and ten minutes time, you can craft these absorbent mosses into a wound binding poultice that promotes quick healing. When successfully applied to the wound, the creature heals 4d8 hit points. The number of die increases by an additional 1d8 at level 8, level 12, and level 17.

7-9
Drumsella
Snarglegrass
Smokey Cap
Once collected and ground, the ointment will lose its effectiveness after 24 hours.
-Burn Ointment:  This paste reduces pain and speeds in the recover of burns, as long as it is applied within twenty minutes of taking fire damage from any source.  On a successful DC 10 Medicine (Wisdom) check you can craft these plants into an ointment and apply it to a wounded creature. The wounded creature heals 5 (1d6 + 2) hit points and the burns are soothed.  This number increases by 1d6 at 5th level, 8th level, 12th level, and 18th level.

10-12
Jester's Grin
Garget
Once collected and crushed into a tea blend, the ingredients will lose their potency after 12 hours.
-Hearth Tea: With a DC 15 Wisdom (Medicine) ability check this delicate mixture of rare flowers can be boiled into a soothing tea and consumed by up to 6 creatures over a short rest. At the end of the short rest, each creature who drank a portion of the tea can regain one spell slot of 1st or 2nd or 3rd level, or regain 2 hit dice they spent to regain hit points during the short rest.