Lifes are dropped by Prayer. You need to kill her 6 times and type in "I want a life". She'll ask you "Do you even have a life?" Answer "No" and she will trade you. You will be given a life and she will say. "Here, take it. You can sell this life for 2164T coins at the Grand Exchange" you will be like "But there is no grand Exchange" but she'll just go "Shhhh.... you are okay =w=" and teleport.
CONGRATS! YOU NOW HAVE A LIFE!STAT INFO:
Life
Examine Text: What am I doing with this?
OPTIONS:
Eat - Heals 1HP
Emote - Glitchy emote
PRICE AT STORE:
Cannot be sold.
GE PRICE:
You need to find it.