Had an idea and I think it will be a fun one!

Elixir of Regeneration Item 1+

Alchemical Consumable Elixir Healing
Usage held in 1 hand; Bulk L
Activate  Interact

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Elixirs of Regeneration enhances the natural healing abilities of a target for 10 minutes. Upon drinking this elixir, you gain fast healing for 10 minutes while you are alive.

Elixir of Regeneration (Minor)Item 1

Price 3 gp
You gain fast healing 2 for 10 minutes.

Elixir of Regeneration (Lesser)Item 5

Price 30 gp
You gain fast healing 4 for 10 minutes.

Elixir of Regeneration (Moderate)Item 9

Price 150 gp
You gain fast healing 6 for 10 minutes.

Elixir of Regeneration (Greater)Item 13

Price 600 gp
You gain fast healing 8 for 10 minutes.

Elixir of Regeneration (Major)Item 15

Price 1,300 gp
You gain fast healing 10 for 10 minutes.

Elixir of Regeneration (True)Item 19

Price 8,000 gp
You gain fast healing 12 for 10 minutes.

Thoughts?