Amrita

Cannot be auctioned, traded, or bazaared, but can be delivered to a character on the same account.
Can be obtained as a random reward from the Gobbie Mystery Box Special Dial and similar sources.

Amrita, also known as Amrit, is a cognate of ambrosia with a similar meaning. According to the Dharmic religions, it is the drink that grants gods their immortality. Amrita literally means "without death," which would correlate with the regen granted.

In the Hindu religion, when the gods lost their immortality, due to the sage Durvasa, they, with demonic aid, churned the sea to form Amrit. Upon regaining immortality they slew the demons.

In Sikhism, Amrit is a holy water used in baptism. It is mixed with sugar and other solubles and is stirred with a sword called a Khanda.

In Buddhist mythology, it is linked to the slaying of the beast Rahu by Vajrapani. The blood of Rahu is said to be the origin of many medicinal plants.